Underwear & Activewear for Men   

All About Men's Underwear

Tomima Says
Proper Men's Underwear Fitting

Men's Underwear Sizing Information

See the links for other subjects:
Underwear Sizing Chart

Choosing the Right Size

HisRoom carries a broad range of brands, and sizing can vary a lot from one manufacturer to another.
If you are familiar with the brand, order the same size you usually do - we use the same sizes as the manufacturer. For items from other brands, our guidelines should help you determine your size.  We provide a sizing chart for each item on our site.
And, if you are between sizes on the chart, order the size larger or smaller based on the style or type of fit you prefer.

Most of our men's underwear is sized according to a man's waist size - not his pouch or cup size. Please refer to our sizing charts below to assist in determining your proper size. If your waist size falls on the borderline between two sizes, choose the larger or smaller size depending upon how snugly you like your underwear.

For athletic wear such as jockstraps, the size again is based on waistband size. If you are on the border of a size range, select the larger or smaller size based on your support preference. For example, if a jockstrap is available in small (26-32) and Medium (32-38) and your waist size is 32 inches, choose the bigger or smaller size based on how tightly you like the jock to fit. Also note that a jock will mold to your shape with repeated wear and washing.

How & What to Measure

As a general rule, the number of inches measured will equal your size, when measured correctly. Be sure to measure your body; do not measure over shirts or slacks.


This should be the largest measurement around your chest. With arms at sides, measure around your upper body under your armpits and over the fullest part of your chest and shoulder blades, keeping tape parallel to the floor.


With your arm bent at 90 degrees, place your hand on your hip. Start at the center of the back of your neck and measure across the shoulder, down to the elbow, then to the wrist. This is your sleeve measurement.


Measure around your body at the position you normally wear your pants. Make sure your measuring tape is horizontal with the floor. Another option is to measure the waistband of a well-fitting pair of pants (zippered and closed).


Measure a similar style of boxers that fit the way you want. Measure from the crotch seam to the hem. This, in inches, will be your inseam measurement.