Joybuy Insights

Buying T-Shirts: Choosing the Right Fit, Material and Purpose

T-shirts are among the most versatile items of clothing in everyday life. They can be worn as a basic shirt in the office, as a layering base under a jumper, for sport or as a statement streetwear piece. The range includes men’s T-shirts and women’s T-shirts, as well as cotton T-shirts, oversized T-shirts, performance tops and practical T-shirt packs.

Despite the seemingly straightforward product category, a few typical purchasing decisions can lead to disappointment later on. A low price says little about the fit, a high cotton content does not automatically guarantee the desired thickness, and a fashionable look is no substitute for carefully checking the care instructions.

Common T-Shirt Buying Mistakes

1. Taking size labels at face value

A size M T-shirt can fit differently depending on the brand and cut. This is particularly true of oversized styles, where the label should not be equated with a conventional close-fitting cut. International size labels such as EU, UK, US, FR or IT can also lead to incorrect orders.

Before buying, check:

  • Chest measurement according to the size chart
  • Shoulder width and overall length
  • Collar measurement, if provided
  • Desired fit: close-fitting, regular or loose
  • Additional room for layering

2. Confusing material descriptions with quality

“Cotton” initially describes only the fibre. Weight, weave or knit, elastane content and construction also influence comfort and shape retention. A lightweight cotton T-shirt may be suitable for warmer days, while a heavier single-jersey fabric has a more structured drape and may appear less see-through.

For blended fabrics, the percentage composition is important. A shirt made from 95% cotton and 5% elastane may feel more flexible than a pure cotton style. This stretch content can be practical for undershirts or close-fitting base layers.

3. Underestimating care instructions

Washing temperature, drying and ironing instructions affect a garment’s lifespan. Printed T-shirts should often be washed inside out. With black and coloured clothing, washing items with similar colours can reduce the risk of colour transfer. Depending on the material, high temperatures or regularly using a hot dryer can alter the fit and surface.

The Most Important Selection Criteria

Material and fabric weight

Cotton T-shirts are widely used for everyday wear and leisure because of their natural fibre. Pay attention to the exact composition:

  • 100% cotton: a classic material for basic shirts and casual clothing
  • Cotton with elastane: greater stretch, often used for close-fitting cuts
  • Bamboo fibre: described by the product information as soft, stretchy and intended for moisture-wicking shirts; the exact material details should be checked on the label
  • Polyester or performance blends: often used for performance tops and breathable T-shirts for active use

Fabric weight is sometimes stated in grams per square metre. For example, the Urban Classics Heavy Oversized Tee is listed as 240 g/m² single jersey and 100% cotton. This is specific information about fabric thickness, but it is not a general judgement of quality.

Cut and intended use

A regular-fit T-shirt is usually suitable as a standalone top or as an unobtrusive layer under a jacket. Oversized T-shirts have a roomier cut and provide more space around the chest, shoulders and body. Check whether the additional width is actually what you want, or whether you have simply selected a larger standard size.

For the office or under a shirt, plain black T-shirts, white T-shirts and styles with a flat neckline are usually easy to wear. For streetwear, printed T-shirts such as a Nirvana T-shirt or an oversized shirt with a graphic can define the overall look. With printed designs, pay particular attention to the washing and ironing instructions.

Size and size chart

Where possible, use a well-fitting T-shirt for comparison. Lay it flat and measure:

  1. Chest width from armpit to armpit
  2. Shoulder width
  3. Length from the highest point of the shoulder to the hem
  4. Collar or neck measurement, if applicable

For the adidas Trefoil Tee styles, the stated standard size chart ranges from XXS to XXXL. The product details include EU, UK, US, FR and IT equivalents, among others. What matters most is whether the measurements of the specific style match your preferred fit.

Our Selection by User Profile

Suitable for: Budget-conscious beginners
Claudio 5-pack T-shirt Cotton White

Claudio 5-pack T-shirt Cotton White

Why this product suits this profile: The pack of five white T-shirts is designed to provide a larger everyday rotation for regular wear, layering and frequent washing.

How this product avoids the trap

The pack size reduces the need to repeatedly buy individual basic shirts. The product description lists 100% cotton and a size chart with several international equivalents.

Key benefits & strengths

Five pieces per pack, white colour and a stated composition of 100% cotton.

Suitable for: Buyers with high quality expectations
adidas Trefoil Tee S

adidas Trefoil Tee S

Why this product suits this profile: This branded style is intended for buyers looking for a simple T-shirt with clear branding and specific care instructions.

How this product avoids the trap

Choosing a specific size rather than relying on a blanket “true to size” statement makes comparison easier. The product details specify 92% cotton, along with washing and drying instructions.

Key benefits & strengths

adidas branded style, 92% cotton and standard sizes from XXS to XXXL available according to the product details.

Suitable for: Specific uses & frequent wearers
BAMBOO COOL Men's Undershirt 3 Pack

BAMBOO COOL Men's Undershirt Moisture-Wicking T-Shirts, 3 Pack

Why this product suits this profile: According to the product description, the three white undershirts are intended for layering, exercise, the office, leisure and wearing under shirts.

How this product avoids the trap

According to the product details, the tag-free design and concealed collar are intended for wearing under other clothing. The pack makes it easier to change tops when they are worn frequently.

Key benefits & strengths

Bamboo fibre according to the supplier, three-pack, stretch construction and moisture-wicking function according to the product description.

Looking for more options?

We have put together a complete, regularly updated list of products that fully meet these strict selection criteria and the safety regulations applicable in the EU.

Care and Durability in Everyday Use

A T-shirt’s lifespan depends not only on the material but also on how it is treated. Always follow the sewn-in care label. The models mentioned come with the following care recommendations, among others:

  • Wash printed T-shirts inside out where possible
  • Wash similar colours together
  • Avoid bleach
  • Choose low tumble-drying temperatures or air-dry the garment
  • Do not iron directly over printed areas
  • Adjust the washing temperature and programme to the care label

For black T-shirts, a mild detergent for dark clothing may be useful. White T-shirts are easier to coordinate with other items, but they show stains and discolouration more quickly. T-shirt packs are practical for frequent wear, while an individual branded or graphic T-shirt can be chosen as a statement top.

T-Shirt FAQs

Which T-shirts are suitable as undershirts?

For undershirts, thinner, close-fitting styles with a soft neckline and, where appropriate, some stretch are practical. The key is ensuring that the hem does not create a noticeable ridge under a shirt. A longer cut can provide extra hold when tucked in.

How do I find the right T-shirt size?

Compare the chest width, shoulder width and length with an existing T-shirt. With an oversized cut, do not automatically buy a larger standard size, as the additional room is already built into the design. If you are between two sizes, consider your preferred fit and whether you may be wearing additional layers.

What is better for sport: cotton or performance fabric?

Cotton can be suitable for everyday wear, leisure and light activities. For intense exercise, breathable performance T-shirts are often preferred because, according to the material concept, they are designed to move moisture away from the skin. Check the actual fibre composition, care instructions and fit rather than relying solely on terms such as “Performance” or “Dry”.