Sizing as as follows with the inches given to approximately the starting point to how much it stretches comfortably
*SMALL
Chest- from 27 to 32 inches around
Waist-24 - 30 inches
Length of shirt- 22 inches
Sleeve length-22 inches
Shoulder width-13 inches
*MEDIUM
Chest- 28 to 34 in
Waist- 25 - 30 in
Length- 22 in
Sleeve- 22 in
Shoulder- 13.4- 18in
*LARGE
Chest- 30-36
Waist 26 - 31
Length 23in
Sleeve 23in
Shoulder 13.8 - 18.8