M's SS Shirt Size Chart

1-Length
 2-Chest 3-Sleeve
S 27.75 21 8.75
M 28.5 22 9.25
L 29.25 23 9.75
XL 30 24.5 10.25
2XL 30.75 26 10.75
3XL 31.5 27.5 11.25
 

*All measurements are in inches and were calculated on flat garments.