SIZE: Small
Approximate measurements:
 Shoulder to shoulder: 20- 21 inches
Armpit to armpit: 18-19 inches 
Sleeve length: 18 inches
Length from shoulder to bottom: 22-23 inches

SIZE: MEDIUM
Approximate measurements:
Shoulder to shoulder: 22 - 24 inches 
Armpit to armpit: 20 - 22 inches
Sleeve length: 20 - 22 inches
Length from shoulder to bottom: 24-27 inches

SIZE: LARGE
Approximate measurements:
Shoulder to shoulder: 25 - 27 inches
Armpit to armpit: 23 -24 inches
 Sleeve length: 22 - 23 inches
Length from Shoulder to Bottom: 27 - 29 inches

SIZE: XL EXTRA LARGE
Approximate measurements:
Shoulder to shoulder: 27 - 29 inches 
Armpit to armpit: 24 - 26 inches
Sleeve length: 23 - 25 inches
Length from Shoulder to Bottom: 29 - 31 inches

SIZE: XXL 2 EXTRA LARGE
Approximate measurements:
Shoulder to shoulder: 30 - 32 inches 
Armpit to armpit: 26 - 28 inches
Sleeve length: 25 - 27 inches
Length from Shoulder to Bottom: 31- 33 inches