NWT POLO RALPH LAUREN SIGNATURE EMBROIDERED ALL OVER SHIRT . CLASSIC FIT 100% COTTON Sz S shoulder to shoulder : 16” armpit to armpit : 19” Lenght from shoulder 23.5” Sz M shoulder to shoulder : 17” armpit to armpit: 20” Lenght from shoulder : 23.5” Sz L shoulder to shoulder :17” Armpit to armpit : 21.5” Lenght from shoulder : Sz XL shoulder to shoulder :18” armpit to armpit :22”-23” Lenght from shoulder :24”