Classic T-Shirt Sizing (Unisex):

Size (Inches)Small (S)Medium (M)Large (L)Extra Large (XL)
Chest Width19"21"23"25"
Length29"30"31"32"
Neck Width7.25"7.75"8.25"8.75"
Shoulders16.5"18"19.5"21"

Men's Performance Shirt Sizing:

Size (Inches)Small (S)Medium (M)Large (L)Extra Large (XL)XX Large (XXL)
Chest39" - 41"42" - 44"45" - 47"48" - 50"51" - 53"
Waist35" - 36"37" - 38"39" - 40"41" - 42"43" - 44"
Sleeve Length24.75"25"25.5"25.75"26"
Neck Width7"7"7"7.75"8"

Women's Performance Shirt Sizing:

Size (Inches)Small (S)Medium (M)Large (L)
Chest Width32" - 33"34" - 35"36" - 37"
Waist28" - 29"30" - 31"32" - 33"
Sleeve Length27.5""28.5"29.5"
Neck Width7.25"7.5"7.75"