Joybuy Insights

Choosing men’s underwear: how to find the right fit, fabric and pack size

Good men’s underwear should feel comfortable, keep its shape and suit your everyday needs. But comparing products online isn’t always easy. Product photos rarely show how a waistband feels, while terms such as ‘sporty’, ‘breathable’ and ‘stretch’ don’t tell you much without clear fabric details.

This practical buying guide helps you compare men’s boxer shorts, trunks and briefs using details you can check. You’ll also find out which styles suit everyday wear, sport, plus sizes or a value multipack.

Three common pitfalls when buying men’s underwear

1. Focusing only on the brand or appearance

A familiar logo and a polished product photo don’t tell you how something will fit. For example, Calvin Klein men’s underwear may include hip briefs, trunks and boxer briefs. Each style fits differently around the hips and thighs.

So, check these details first:

  • the style: briefs, trunks or boxer briefs;
  • the rise: low rise, mid-rise or regular waist;
  • the leg length;
  • the stated waist measurement in centimetres;
  • the fabric composition.

2. Assuming ‘cotton’ means 100% cotton

Many cotton men’s underwear styles combine cotton and elastane. That’s not necessarily a drawback. A fabric blend such as 95% cotton and 5% elastane will usually stretch more than pure cotton. Always check the label, though, as fabric details can vary between styles.

Look out for terms such as ‘stretch’, ‘moisture-wicking’ or ‘quick-dry’ too. If these describe a brand’s product features, treat them as claims made by the manufacturer rather than guaranteed results for every wearer.

3. Not comparing pack sizes properly

A multipack of men’s underwear may look like good value, but compare the price per pair and check which sizes and colours are available. A 3-pack of men’s boxer shorts is handy if you need a smaller supply or want to try a fit first. A 5-pack is a better choice if you want to change pairs regularly or do laundry less often.

Which specifications matter?

Fit and waist

Measure your waist where the waistband usually sits. Compare that measurement with the size chart for the specific product. A size ‘L’ doesn’t mean the same thing across every brand.

A tight elastic waistband can feel uncomfortable when you’re sitting or moving. A loose one may ride up or shift around. For plus-size men’s underwear, pay particular attention to the measurements in centimetres rather than relying on XL, XXL or 3XL alone. Size ranges vary between products.

Fabric and stretch

These fabric options are practical for everyday wear:

  • Cotton with elastane: soft to the touch, with some stretch and freedom of movement.
  • Men’s stretch underwear: a good choice if you move around a lot or prefer a close fit.
  • Pure cotton: a straightforward option, but check that the style fits securely.
  • Cotton with polyester and elastane: found in some sporty trunks and, according to the product description, may be designed for flexibility and easy care.

Check the care instructions as well as the fabric composition. Some styles shouldn’t be tumble-dried or need to be washed at a low temperature. This can affect how well they keep their shape and stretch.

Style and occasion

  • Men’s briefs: less fabric and plenty of freedom of movement around the thighs.
  • Men’s trunks: shorter legs and a close fit; suitable for everyday wear and under slim-fitting trousers.
  • Boxer briefs: longer legs and more coverage; practical for movement or if you want to reduce rubbing between your thighs.
  • Sports underwear: look for a flexible waistband, a close fit and clear care instructions.

Our recommendations for different shoppers

Suitable for: Budget-conscious first-time buyers
FILA Men's Briefs 5-Pack Black Size L

FILA Men's Briefs 5-Pack Black Size L

Why it suits this shopper: A 5-pack of black briefs is a practical choice if you want several identical pairs for everyday wear.

How this product avoids the pitfall

The pack size of five and size L are clearly stated. Before buying, check the exact cotton-to-elastane ratio and waist measurement.

Key benefit & highlights

5-pack, black colour and a cotton-elastane blend according to the product description.

Suitable for: Shoppers looking for premium quality
Calvin Klein 3 Pack Low Rise Trunks Black 3XL

Calvin Klein 3 Pack Low Rise Trunks - Icon Cotton Stretch - Black 3XL

Why it suits this shopper: This style combines a low-rise design with 95% cotton and 5% elastane, and is available in size 3XL.

How this product avoids the pitfall

The product details include the fabric composition, sizing and 3-pack. That makes it easier to compare the style on more than just its brand name.

Key benefit & highlights

Stretch cotton, black colour, low-rise fit and a contoured pouch according to the product description.

Suitable for: Specific needs & frequent wear
Reebok RBK SPORTS TRUNKS BAIRD

Reebok RBK SPORTS TRUNKS BAIRD

Why it suits this shopper: The product description mentions a sporty fit, flexible waistband and a pack of five.

How this product avoids the pitfall

The description clearly states what the style is designed for. Check the care label too before wearing it regularly for sport.

Key benefit & highlights

Sporty trunks, flexible waistband and 5-pack according to the product information.

Suitable for: Men who need a wider choice of sizes
Urban Classics Boxer Shorts 3-Pack

Urban Classics Boxer Shorts 3-Pack Underwear

Why it suits this shopper: The size chart ranges from XS to 8XL, making this style worth considering for a variety of body shapes.

How this product avoids the pitfall

The size chart includes EU and international sizes. Compare these details with your own waist measurement rather than relying on the letter size alone.

Key benefit & highlights

3-pack, 95% cotton and 5% elastane, with sizes up to 8XL according to the product details.

Looking for more options?

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

Care tips to help them last longer

Wash men’s underwear according to the care label. Many stretch styles keep their shape better if you avoid washing them at high temperatures and don’t tumble-dry them. Wash black styles with similar colours and avoid bleach unless the care instructions say it’s safe.

Check the waistband and seams after several washes. Seams coming undone, lasting distortion or elastic that no longer springs back are practical signs that it’s time to replace a pair. How long they last depends on the fabric, how often you wear them, the washing temperature and the drying method.

Frequently asked questions about men’s underwear

How do I find the right size in men’s underwear?

Measure your waist in centimetres and compare it with the size chart for the style you’ve chosen. Check the fit too: a low-rise trunk sits differently from a regular-waist boxer brief. For plus-size men’s underwear, measuring in centimetres is especially important.

Are men’s trunks suitable for everyday wear?

Yes, men’s trunks are a popular choice for everyday wear thanks to their shorter legs and close fit. Check that the waistband feels comfortable and that the legs don’t ride up when you walk or sit down.

Is a multipack of men’s underwear better value?

It can be, but compare the price per pair and check the fabric, size and colour. A 3-pack of men’s boxer shorts is a good way to try a style. A 5-pack is handy if you need several pairs at once. If you spot an offer, check the care instructions and available sizes too.