Joybuy Insights

Buying clothes online: how to choose comfortable clothing without making a costly mistake

Buying clothes online may seem straightforward, but an attractive product photo does not always tell the whole story. A T-shirt may be thinner than expected, trousers may fit differently depending on the cut, and sizing for underwear is not always consistent between brands. Terms such as “soft”, “durable” and “breathable” only become meaningful when you check the material composition, size guide and care instructions.

Use these practical selection criteria to compare clothing more effectively. That way, you can find everyday clothing suited to how you use it, your budget and your preferences for cotton, well-known brands or multipacks.

Common pitfalls when buying clothes online

1. Relying solely on the size letter

A size S, M or XL is not a fixed standard. Always check the chest, waist and hip measurements in centimetres. For example, the Adidas Trefoil Essentials Tee JI8545 Black S lists a chest width of 48 cm. That is more specific than relying on the letter S alone.

Also consider the type of fit:

  • Regular fit generally offers more room.
  • Slim fit sits closer to the body.
  • Relaxed fit has a roomier cut.
  • A non-stretch fabric allows less freedom of movement than a stretch blend.

2. Confusing “cotton” with 100% cotton

A garment containing cotton may also include polyester or elastane. That is not necessarily a disadvantage, but it does affect how the garment feels, its stretch and how it should be cared for. According to the product information, the Reebok Crew Neck Tee consists of 60% cotton and 40% polyester, while the Adidas Adicolor Classics 3-Stripes Tee is described as 100% cotton.

If you are specifically looking for cotton shirts, it is worth reading the full composition. For men’s shirts or heavier cotton clothing, the fabric weight is also relevant. According to the product description, the LEE 7 1/4OZ NS Cotton Shirting has a heavier cotton fabric and a non-stretch structure.

3. Treating marketing claims about performance as guarantees

Words such as “antibacterial”, “hypoallergenic” or “durable” require additional scrutiny. Do not treat such claims as guaranteed results. According to Utree’s product information, the gusset of certain models contains a cotton material with an “10A antibacterial” property, as stated by the seller. This is a claim from the product description; it is not a medical assessment or a guarantee of a personal benefit.

When choosing everyday underwear, focus on verifiable details such as the fabric composition, rise, seams, size range and washing instructions.

The key specifications to compare

Material and stretch

For comfortable everyday clothing, 100% cotton, cotton-modal and cotton blends are common choices. Cotton feels familiar and can be comfortable for T-shirts, jogging bottoms and underwear. Modal or elastane can provide added softness and flexibility. However, check whether you are looking for a sturdy, shape-retaining fabric or a more stretchy fit.

For women’s and men’s underwear, the leg openings, waistband and lining are also important. An underwear multipack can be practical for everyday use, but compare the price per item and check whether all the pieces have the same composition.

Fit and measurements

Use a garment you already find comfortable as a reference. For example, measure the chest width of a well-fitting men’s T-shirt or the waist of a pair of jogging bottoms. Then check the size guide for the new model.

When choosing trousers, look at:

  • waist measurement and the position of the waistband;
  • inside-leg or total leg length;
  • whether they have an elasticated waist and drawstring;
  • pockets and the amount of freedom of movement you want.

According to the product information, the LEE PANT WOVEN YUKON has a drawstring waistband and deep pockets. This makes the trousers practical for wearing at home and for casual use, but the size should still be matched to the stated measurements.

Care and expected lifespan

The washing instructions indicate how to preserve the colour, shape and fabric as effectively as possible. For example, a black T-shirt may be best washed inside out with similar dark colours. Some products should not be tumble-dried.

Before buying, check:

  1. maximum washing temperature;
  2. whether it is suitable for tumble-drying;
  3. ironing instructions;
  4. any instructions for prints, logos or delicate fabrics.

A minimum two-year legal guarantee applies to many consumer products in the EU, but normal wear and tear or damage caused by incorrect care may be assessed differently. Therefore, keep the product information and follow the care label.

Our recommendations for different user profiles

Suitable for: Budget-conscious beginners
Adidas Trefoil Essentials Tee JI8545 Black S

Adidas Trefoil Essentials Tee JI8545 Black S

Why it suits this profile: This black T-shirt has a crew neck, regular fit and a subtle Trefoil logo. It works well as a standalone casual top or as a layer under a jacket.

How this product avoids the pitfall

The product information mentions soft cotton jersey and a regular fit. However, check the stated chest width of 48 cm before ordering.

Key benefit & advantages

Cotton jersey, regular fit, crew neck and suitable for casual wear, sport or layering.

Suitable for: Shoppers looking for premium quality
Tommy Hilfiger Tommy Jeans men’s shirt

Tommy Hilfiger Tommy Jeans Men's Slim Fit Poplin Shirt

Why it suits this profile: A good choice for anyone who wants a polished look without sacrificing freedom of movement. The product information states that it has a slim fit, stretch and 100% organic cotton.

How this product avoids the pitfall

The stated size guide includes chest and sleeve lengths. This helps you assess a slim fit more accurately than relying on the size letter alone.

Key benefit & advantages

Stretch fabric, tailored fit and, according to the product information, independently certified organic cotton.

Suitable for: Specific uses & frequent users
YIJINCHAN women’s disposable underwear 3-pack

YIJINCHAN Women's Disposable Pure Cotton Underwear 3-Pack

Why it suits this profile: Practical for travel, the gym or as a spare. The pack contains three individually wrapped disposable briefs made from, according to the product information, 100% cotton.

How this product avoids the pitfall

For this type of use, you do not need to have access to washing facilities. Check the hip measurement of 99–109 cm for size L beforehand.

Key benefit & advantages

3-pack, individually wrapped and intended for single use when travelling or as an emergency supply.

Suitable for: Practical multipack shoppers
Calvin Klein 3-pack bikini briefs

Calvin Klein 3 Pack Bikini Briefs

Why it suits this profile: Anyone who regularly needs women’s underwear gets three colours in one pack: black, grey and white. The fitted cut is made from a stretchy cotton blend.

How this product avoids the pitfall

The product page states a composition of 90% cotton and 10% elastane and includes a waist and hip size guide.

Key benefit & advantages

Three pairs, cotton-stretch blend, lined gusset and machine washable according to the product information.

Looking for more options?

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

Frequently asked questions about buying clothes online

How do I determine my clothing size when ordering online?

Measure your chest, waist or hips with a flexible tape measure and compare these measurements with the size guide for the specific product. Also consider the fit and fabric: a slim fit without stretch will feel different from a regular fit made from an elasticated cotton blend.

Is an underwear multipack better value?

That depends on the price per item, material and how often you intend to use it. Divide the total price by the number of items and check whether all pieces have the same size, cut and composition. A 3-pack can be practical for everyday rotation; disposable underwear is mainly intended for travel or temporary use.

How do I care for cotton clothing so that it lasts longer?

Always follow the care label. Ideally, wash dark cotton shirts with similar colours, use a mild detergent and avoid tumble-drying if this is advised. Washing garments inside out helps protect those with a print or logo. For organic cotton clothing, also check the brand’s specific care instructions.