Each pattern is a little different. These are new even though they don't have retail tags.
Small chest at underarm seams approx. 36", sleeve 26" . Shoulder 5" , length down center back 27.5.
Front is about an inch shorter
Medium chest at underarm seams approx 38", sleeve 26. Shoulder 6, length 29 down center back.
Front is about an inch shorter.
Large chest at underarm seams approx 44", sleeve 26. Shoulder 6.5, length 31.
Front is about 1.5" shorter
2XL chest at underarm seams approx 51, sleeve 26. Shoulder 8.5, length 32.
Front is about 1.5" shorter
3XL chest at underarm seams approx 54, sleeve 26. Shoulder 9, length 32.5
Front is about 2" shorter.