Isaac™ | Casual Shirt for Men
Isaac™ | Casual Shirt for Men
Isaac™ | Casual Shirt for Men
Isaac™ | Casual Shirt for Men
Isaac™ | Casual Shirt for Men

Isaac™ | Casual Shirt for Men

$84.95 $249.95 Save $165.00

Colour
Size (AU)
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ANNIVERSARY SALE UPDATE
Due to high demand during our 25-year anniversary sale, only a limited number of items are left. If you can still click 'Add to cart', it’s still available.

Effortless Style with a Relaxed Fit

The Isaac Casual Shirt is designed for men who appreciate a balance of comfort and style. Featuring a tailored yet relaxed fit, this versatile piece is perfect for both casual outings and smart-casual occasions. Crafted from breathable fabric, it ensures all-day comfort without compromising on sophistication.

Why You’ll Love It:

Timeless & Versatile – A wardrobe essential that pairs effortlessly with jeans, chinos, or layered under a jacket.
✅ Soft & Breathable Fabric – Designed for all-day wear, keeping you cool and comfortable.
✅ Relaxed Yet Tailored Fit – Provides a flattering silhouette while allowing easy movement.
✅ Minimalist & Modern Look – Perfect for casual weekends or polished enough for dinner plans.
✅ Effortless Styling – Dress it up with formal trousers or keep it laid-back with denim.

How to Style:

  • Pair with slim-fit jeans and sneakers for a casual yet refined everyday look.
  • Layer under a lightweight jacket for a sophisticated, laid-back outfit.
  • Wear with tailored trousers and loafers for a smart-casual aesthetic.
Upgrade your wardrobe with the Isaac Casual Shirt – where comfort meets effortless style.


Size Chest Waist Shoulder Length Sleeve
S 98 92 42 67 59
M 102 96 44 69 60
L 106 100 46 71 61
XL 110 104 48 72 62
2XL 114 108 50 74 63
3XL 118 112 52 76 64

Today only, you'll receive FREE shipping on all orders.

Each Olive & Iris order is carefully packed by us and sent with passion to your doorstep - straight from our boutique.

After you place an order and we have processed it, you'll receive a track & trace code through email which you can use to track your order.

Pay safely with PayPal, Credit Card and more!

With us, your payment is 100% secure. We use advanced SSL (Secure Sockets Layer) technology to protect your personal data and payment information. SSL encrypts the data you enter so it cannot be intercepted by third parties.

Buyer protection
In case you are not satisfied with your order or it was not delivered on time, we guarantee you will receive a refund.

We want you to be satisfied with your product. If you do not like your order, please contact us within 30 days after delivery for return options.

our 25th anniversary sale ends today!

From our very first designs to becoming a boutique name loved across Australia — Olive & Iris has always stood for timeless style, lasting quality, and everyday confidence.

To celebrate this journey, we’re giving you a chance to shop your favourite pieces at up to 80% OFF.

Extra automatic savings at checkout:


Buy 2 → +10% off
Buy 3 → +15% off
Buy 4 → +20% off
Buy 5+ → +25% off

Mix & match any styles — discounts apply automatically.

With love,

Olive & Iris


Loved by thousands!

Sophie M. - Sydney

Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out.

Claire R. - Melbourne

The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too.

Amelia T. - Brisbane

Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece.

Emily J. - Adelaide

Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it.

Hannah L. - Perth

Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three.

Georgia K. - Gold Coast

I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique.

Sophie M. - Sydney

Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out.

Claire R. - Melbourne

The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too.

Amelia T. - Brisbane

Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece.

Emily J. - Adelaide

Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it.

Hannah L. - Perth

Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three.

Georgia K. - Gold Coast

I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique.

Sophie M. - Sydney

Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out.

Claire R. - Melbourne

The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too.

Amelia T. - Brisbane

Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece.

Emily J. - Adelaide

Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it.

Hannah L. - Perth

Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three.

Georgia K. - Gold Coast

I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique.

Sophie M. - Sydney

Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out.

Claire R. - Melbourne

The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too.

Amelia T. - Brisbane

Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece.

Emily J. - Adelaide

Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it.

Hannah L. - Perth

Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three.

Georgia K. - Gold Coast

I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique.

Sophie M. - Sydney

Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out.

Claire R. - Melbourne

The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too.

Amelia T. - Brisbane

Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece.

Emily J. - Adelaide

Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it.

Hannah L. - Perth

Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three.

Georgia K. - Gold Coast

I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique.

Sophie M. - Sydney

Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out. Honestly didn’t expect the fabric to feel this soft. Been wearing mine to work and it still looks fresh after a few washes. Might grab another colour before they sell out.

Claire R. - Melbourne

The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too. The fit was spot on — I’m usually between sizes and went with a 10. It’s flattering without being tight, which is rare. Shipping with AusPost was quicker than I thought too.

Amelia T. - Brisbane

Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece. Love the cut, feels a bit more ‘boutique’ than the usual online stuff. My sister saw it and instantly ordered one as well. Definitely more than a one-season piece.

Emily J. - Adelaide

Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it. Wasn’t sure if the colour would look the same in real life — but it’s exactly like the photos. Been pairing it with denim shorts and I’ve had strangers ask where I got it.

Hannah L. - Perth

Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three. Fabric feels breathable which is perfect here in Perth. Not see-through at all (my biggest worry). One small thing though, the tag was a bit scratchy at first, but I just snipped it off and it’s perfect now. Price was fair, especially with the bundle discount. I bought three.

Georgia K. - Gold Coast

I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique. I don’t usually leave reviews but this one deserves it. The packaging was minimal but nice, and the quality feels like something I’d normally pay double for at a boutique.


free shipping on all orders

Every order ships free with Australia Post & NZ Post. Packed with care and delivered straight from our boutique to your door.

25th anniversary sale

We’re celebrating 25 years of style and craftsmanship with our biggest sale ever. Timeless pieces, premium quality — sale ends today!

100% Satisfaction guarantee

Your order is backed by our 30-day return policy. If it’s not quite right, simply return it within 30 days and we’ll make it right — hassle free.