For longer styles like boxer briefs, some brands provide an inseam measurement. Measure from your crotch down to where you want the leg opening to sit.
To get an accurate fit, use a flexible fabric or vinyl measuring tape rather than a rigid metal one. Measure directly against your skin or over very thin clothing. how do you know what size underwear to buy
How to Choose the Right Panty Size: A Guide for a Perfect Fit For longer styles like boxer briefs, some brands
Locate your natural waistline, which is the narrowest part of your torso, typically just above the belly button. Breathe normally and keep the tape snug but not tight—you should be able to slide one finger underneath. For longer styles like boxer briefs