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KNucks Underwear


Boxer Briefs

Our most popular silhouette. Boxer Briefs feature a 5” inseam, with compression fabric that sits comfortably mid-thigh and offer the most breathability.


With a 3” inseam, Trunks are slightly shorter than our best-selling Boxer Briefs, and provide the most comfort.


Our sexiest silhouette. Designed for guys who prefer a full range of motion

How to Measure 

We suggest choosing underwear size based on your waist size.   If you have a thicker bottom or prefer a looser fit we recommend going up one size for a more comfortable fit.

1. Waist: Measure around your waist, slightly below your natural waist.

2. Inseam: The inseam runs from the crotch of your underwear to the bottom of the opening. To measure, place tape along the inside leg, from the crotch seam to the leg opening.

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