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Textured close-up of athlete resting on the sand wearing ruhn performance underwear

Size Guide

True to size with a close, supportive fit. 

SIZE WAIST (cm) WAIST (in)
XS 71-76cm 28-30in
S 76-81cm 30-32in
M 81-86cm 32-34in
L 86-91cm 34-36in
XL 96-101cm 38-40in
2XL 106-112cm 42-44in
3XL 117-122cm 44-48in

Getting the right fit matters.
If you’re between sizes, we recommend sizing up.

With our 30 Day First Pair Guarantee, if your first pair isn't quite right, we’ll send you a new size free of charge.

Note: After a replacement is issued, refunds no longer apply.