Nike Men's Fit Guide

Size Chest Waist Hips
Small 35-37.5" 29-32" 35-37.5"
Medium 37.5-41" 32-35" 37.5-41"
Large 41-44" 35-38" 41-44"
X-Large 44-48.5" 38-43" 44-47"
XX-Large 48.5-53.5" 43-47.5" 47-50.5"
XXX-Large 53.5-58" 47.5-52.5" 50.5-53.5"