SM will fit up to a 44" chest and is 30" in length with a 5" sleeve.
MD will fit up to a 46" chest and is 30" in length with a 5" sleeve.
LG will fit up to a 48" chest and is 30" in length with a 5" sleeve.
XL will fit up to a 50" chest and is 30" in length with a 5" sleeve.
2X will fit up to a 52" chest and is 30" in length with a 5" sleeve.