How to Measure Underwear Size
The size you wear in underwear corresponds to the waist size of your jeans. Even when you order a jock strap, the size will still be determined by waist size, not pouch or cup size.
Measure by Waist
Wrap the tape measure around your waist at the same height you wear your jeans. Make sure you pull the measuring tape tight and horizontally around your body.
Select Your Brand To Determine Sizing Measurements
Additional Fit Tips for Underwear
- Know Your Numbers. Some brands actually size their underwear with waist measurement. So all you need to know is your waist measurement to find your size.
- The Euro Standard. European brands tend to be cut slimmer. The measurements for a medium pair of Calvin Klein underwear are not the same as for a medium pair of Diesel underwear.
- Know Your Fabrics. Any pair of underwear containing Lycra, spandex or elastane will have more give than a pair made of 100% cotton, nylon or polyester. If you are between sizes and the pair you want has some stretch added, it may be fine to go with the slightly smaller size. But if you find yourself between sizes in a pair of underwear like the Players Tricot Nylon Men's Boxer, it's a safer bet to go with the larger size.
- Boxers Are Not All Created Equal. In this day and age, boxer shorts come in a choice of different fits. They range from slim fit to traditional fit to relaxed fit. It is mostly a matter of preference which one you choose. Slim-fitting boxers tend to fit better with slim-cut jeans than relaxed-fitting boxers and most guys like lounging around the house or sleeping in more relaxed cuts.
- Boxer Brief Or Trunk, What's The Difference? Often it's a matter of about 2-3 inches that differentiates a boxer brief from a trunk. Both have a contoured cut with a snug fit, but the difference is in the outseam: a boxer brief has an outseam between 10" and 16" while a trunk has an outseam between 7" and 10".








