ATHLETIC BUTTON-UPS FIT TRUE TO SIZE
XS | Chest 35" | Sleeve 10 Inches
SM | Chest 38” | Sleeve 11 Inches
MD | Chest 40” | Sleeve 12 Inches
LG | Chest 43” | Sleeve 13 Inches
XL | Chest 46” | Sleeve 13 Inches
XXL | Chest 54” | Sleeve 13 Inches