Lying flat down approx. size measurements:
Medium
Shoulder(seam line to seam line): 17.5 inches
Armpit to armpit(across chest): 20.25 inches
Sleeve(shoulder seam line to end of sleeve): 24.5 inches
Back body center length(bottom of collar to hem): 29.25 inches
Large
Shoulder(seam line to seam line): 17.75 inches
Armpit to armpit(across chest): 21.25 inches
Sleeve(shoulder seam line to end of sleeve): 24.5 inches
Back body center length(bottom of collar to hem): 29.25 inches
XL
Shoulder(seam line to seam line): 18 inches
Armpit to armpit(across chest): 22.25 inches
Sleeve(shoulder seam line to end of sleeve): 25 inches
Back body center length(bottom of collar to hem): 29.5 inches