S: Armpit to armpit 17-1/2". Collar to waist 22-1/2"
M: Armpit to armpit 19". Collar to waist 23-1/2"
L: Armpit to armpit 20". Collar to waist 24"
XL: Armpit to armpit 22". Collar to waist 24-1/2"
Note: All measurements are taken with the material unstretched, they may stretch to a bigger size.