Nike Warm-Up Sizing Chart
Adult
XSmall Small Medium Large XL
Chest 33 - 35 36 - 38 39 - 41 42 - 44 45 - 47
Waist 26 - 28 29 - 31 32 - 34 35 - 37 38 - 40
Inseam 31 31½ 32 32½ 33
Youth
Chest     27 - 29½ 29½ - 32  
Waist     25½ - 27½ 25½ - 27½  
Inseam     26 28¾