The Ultimate Guide to Casual Shirts

Casual shirts are one of the most versatile pieces in a man’s wardrobe. Whether you’re dressing for a weekend, holiday, or casual Friday, choosing the right shirt can elevate your outfit from ordinary to effortlessly stylish. This guide covers types, styling tips, and where to shop — plus how Tellar.co.uk ensures you always get the right size.

1. What Makes a Shirt 'Casual'?

Casual shirts are typically made from softer fabrics, feature relaxed fits, and use patterns, textures, or design details that distinguish them from formal shirts. Common examples include:

Oxford shirts – A classic staple that’s great tucked or untucked.
Chambray shirts – Lightweight and denim-like, ideal for layering.
Flannel shirts – Brushed cotton for cooler months, often with checks or plaids.
Cuban collar shirts – Short-sleeved with open collars, perfect for summer.
Linen shirts – Breathable, textured, and relaxed.

2. Fit: The Key to Casual Confidence

Casual doesn’t mean baggy or sloppy. Aim for comfort with structure. Key fits include:

Regular Fit – Room to move without looking boxy.
Slim Fit – Tapered without restricting movement.
Relaxed Fit – Great for layering or heatwave-ready comfort.

Use Tellar’s Size Lookup Tool to see what size fits you best across over 1,500 brands — COS, Reiss, Everlane, Arket and more.

3. How to Style Casual Shirts

Weekend Casual: Linen or Oxford shirt, untucked, with chino shorts or relaxed trousers
Smart Casual: Oxford or chambray shirt with dark denim and desert boots
Layered Look: Flannel over a plain white tee and jeans
Holiday Ready: Cuban collar shirt with drawstring shorts or linen trousers

Need inspiration? Read How to Do Casual Style Well.

4. Best Brands to Buy Casual Shirts

Uniqlo – High-quality staples at great prices – uniqlo.com
COS – Clean, minimal designs – cos.com
Arket – Textured fabrics and seasonal colours – arket.com
Everlane – Ethical and stylish basics – everlane.com
Reiss – Smart-casual elevated options – reiss.com
Timberland – Rugged outdoor flannels – timberland.co.uk

5. Why Tellar.co.uk Is Essential for Casual Shirt Shopping

Not all brands size the same. Tellar.co.uk matches your body or known size to over 1,500 brands. Just:

Enter your chest, waist, and hip measurements
Or enter your known size from a store you already wear
Get your best size in COS, Reiss, Arket, Everlane and more

Use the Store Size Lookup Tool Don’t know your measurements? Start here

6. Explore the Tellar Fashion Hub

The Tellar Fashion Hub is the UK’s most trusted library of free, unbiased, stylist-written fashion posts.

Final Word

Casual shirts shouldn’t be an afterthought. With the right material, fit, and colour, they become the hardest-working pieces in your wardrobe. And with Tellar.co.uk, you’ll never have to second-guess sizing again.

Find your size in 1,500+ brands real-time. It’s free & easy. your blog post here...