Small - to fit 29-31 inch waist
Medium - to fit 31-33 inch waist
Large - to fit 33-35 inch waist
X-Large - to fit 35-37 inch waist
XX-Large - to fit 37-39 inch waist
"Thanks for getting in touch - great customer service! I am really pleased with my undercrackers - they are the softest most comfortable ones that I have. I will be ordering more from you in the not too distant future, thank you." Ali Campbell, Glasgow
"The tight boxer is very comfortable, snug and a flattering cut." Leon Dumont, York