Joybuy Insights

Buying men’s clothing online: how to choose the right fit, fabric and size

Buying men’s clothing online is easy, but an attractive product photo doesn’t tell you everything. A T-shirt may fit the model perfectly but feel too tight on you. A sweatshirt may look soft, but the wrong fabric blend could make it too warm. Underwear can also be a disappointing purchase if the sizing is unclear or the elastic waistband becomes less comfortable after a few washes.

Use these practical checks to compare men’s shirts, cotton clothing for men, fleece sweatshirts and men’s boxers based on information you can actually verify.

Common pitfalls when buying men’s clothing online

1. Confusing fit with size

A size L isn’t the same across every brand or style. Slim fit follows the body more closely, while regular fit gives you more room to move. A relaxed fit is looser. So don’t just look at S, M, L or XL: check the chest, waist and hip measurements in centimetres too.

For example, a Calvin Klein men’s slim-fit T-shirt may fit differently from a The North Face relaxed-fit T-shirt for men. The product information for the Calvin Klein Core Monologo Pocket Slim Tee also says that it comes up large. If you want a standard fit, you could consider sizing down; if you’d prefer extra room, choose your usual size.

2. Prioritising a brand name over the fabric composition

A well-known brand doesn’t automatically mean a garment is right for every situation. Check the label or product description:

  • 100% cotton usually feels natural and works well for everyday wear.
  • A cotton-polyester blend can be practical for sport or frequent washing.
  • Elastane gives boxers stretch, but the percentage can affect the fit.
  • A brushed fleece lining is designed to provide extra warmth, but may be less suitable for mild weather.

Claims such as “quick-drying”, “odour control” or “moisture-wicking” sometimes come directly from the brand. Treat them as product claims. According to Under Armour’s product information, its Sportstyle fabric is designed to be lightweight and quick-drying. Your experience will depend on how you use it, the temperature and your personal preferences.

3. Skipping the care instructions

Clothing washed incorrectly can shrink, lose its shape or fade. Check the maximum washing temperature, whether you can tumble dry it and the recommended drying method. Cotton and stretchy fabrics need particular care. A T-shirt that can’t go in the tumble dryer may not suit someone who wants to get their washing dry quickly.

The key specifications to compare

Fit: slim fit, regular fit or relaxed fit

Choose a slim-fit men’s T-shirt if you want a closer silhouette or plan to wear it under a jacket. A regular-fit men’s T-shirt is more practical for everyday wear and gives you more room to move. Relaxed fit is a good choice if you prefer a looser style, for example when travelling, walking or working from home.

Check the neckline, sleeve length and the length of the T-shirt too. A crew neck is versatile, while a slightly longer body can be more comfortable when cycling or bending down.

Fabric and weight

Cotton clothing for men and jersey T-shirts are often easy to style for everyday wear. The product information for the Calvin Klein CK Essential Slim Tee states that it is made from 100% organic cotton. Always check the physical care label when your item arrives, as the composition and care instructions on the garment are the ones to follow.

According to the product information, the The North Face styles in this selection are made from 100% cotton and 160 gsm jersey. This gives you a clear indication of the fabric’s weight, but doesn’t on its own tell you how warm or durable the garment will be in your day-to-day use.

Fabric composition is just as important when choosing a men’s fleece sweatshirt. According to the product details, the Under Armour Icon Fleece Crew is made from 80% cotton and 20% polyester, with a brushed interior. It has a regular fit. This makes it suitable for layering and everyday wear, although how warm it feels will depend on the rest of your outfit.

Sizing for shirts and underwear

For shirts, measure around the fullest part of your chest without pulling the tape measure tight. For boxers, measure your waist where the waistband will sit. Compare your measurements with the size chart for the specific item.

For multipacks, check the number of items and the colours too. A Calvin Klein 3-pack of boxers can be a practical choice if you’re looking for several neutral basics, but check whether the fit is slim, fitted or relaxed. According to the product information, the Calvin Klein Icon Cotton Stretch 3-pack contains black, white and grey boxers and has a slim fit. The Calvin Klein Relaxed Fit Trunk 3-pack contains three black trunks with elastane in the fabric composition.

Recommended choices for different shoppers

Suitable for: Budget-conscious first-time buyers
Calvin Klein CK Essential Slim Tee CK Black Men's M

Calvin Klein CK Essential Slim Tee CK Black Men's M

Why it suits this shopper: A black crew-neck basic that’s easy to pair with jeans, shorts or a jacket. The product information states that it has a slim fit and is made from 100% cotton.

How this product avoids the pitfall

The fit and fabric composition are clearly stated. Check your chest measurement before choosing a slim fit.

Key benefit & highlights

100% cotton according to the product details; the black colour and short sleeves make it a versatile choice.

Suitable for: Shoppers looking for premium quality
Calvin Klein 3-Pack Slim Boxers Icon Cotton Stretch

Calvin Klein 3-Pack Slim Boxers - Icon Cotton Stretch - Black, White, Grey M

Why it suits this shopper: If you’re looking to top up your everyday basics, this pack gives you three neutral colours in one purchase.

How this product avoids the pitfall

The pack size, colours and slim fit are clearly stated upfront. Check your waist measurement to avoid a waistband that feels too tight.

Key benefit & highlights

Three colours; cotton stretch according to the product information; wash at 30 °C.

Suitable for: Specific activities & frequent wear
Under Armour Men's Fleece Crew Navy-White Icon Fleece Collection M

Under Armour Men’s Fleece Crew Navy-White Icon Fleece Collection M

Why it suits this shopper: The regular fit, crew neck and cotton-polyester blend work well for layering, travelling and everyday wear.

How this product avoids the pitfall

The size guide includes chest and waist measurements. Wash cold and avoid fabric softener, as instructed in the product care guidance.

Key benefit & highlights

80% cotton and 20% polyester; regular fit; brushed fleece lining according to the product description.

Suitable for: Men looking for extra room
Calvin Klein CK Essential Reg CN CK Black Men's XXXL

Calvin Klein CK Essential Reg CN CK Black Men's XXXL

Why it suits this shopper: According to the product information, this regular-fit style is available in an extended size range, including XXXL.

How this product avoids the pitfall

The regular fit means a larger size won’t automatically feel like a slim fit; still, check the available size chart.

Key benefit & highlights

100% cotton according to the product description; crew neck; suitable for men’s plus-size clothing.

Looking for more options?

We’ve put together a complete, up-to-date list of products that meet these strict selection criteria and the applicable European safety regulations.

Frequently asked questions about men’s fashion online

How do I work out my size in men’s shirts?

Measure your chest and compare it with the size chart for the brand you’ve chosen. Also check the fit: slim fit, regular fit and relaxed fit can all feel different, even in the same letter size. If you’re unsure, the product page is more useful than a general size chart.

Which men’s shirts are suitable for everyday wear?

Choose a style with a fabric and fit that suit your routine. 100% cotton T-shirts are versatile for everyday wear. A cotton-polyester blend can be practical for sport or frequent washing. Always check the care instructions and stated fit.

How long will a T-shirt or boxer stay comfortable?

How long it lasts depends on how often you wear it, friction, the wash cycle and how it’s dried. Follow the care label, don’t use a higher temperature than recommended and avoid the tumble dryer if the instructions advise against it. For boxers, the waistband’s elasticity and the right size are especially important for lasting comfort.