Sizing info:
S: P2P 20", L 25.5", P2C 21.5".
M: P2P 21", L 25.5", P2C 22".
L: P2P 22", L 27", P2C 22.5".
XL: P2P 23", L 27", P2C 23".
2XL:P2P 24", L27.5", P2C 23.5".
P2P - Pit to pit across the chest.
L - Length from collar to hem
P2C - Pit to cuff on the inside of the sleeve.
Measurements are taken flat and jacket zipped up. All measurements are approximate.