XS (4-5)- 17" Shoulder To Bottom, 13" Armpit To Armpit
S (6-6X)- 17.5" Shoulder To Bottom, 14" Armpit To Armpit
M (7-8)- 19.25" Shoulder To Bottom 15" Armpit To Armpit
L (10-12 plus)- 21.5" Shoulder To Bottom, 17" Armpit To Armpit
XL (14-16 plus)- 23.25" Shoulder To Bottom, 18.5" Armpit To Armpit
These shirts are about an inch longer towards the center