Button Down Shirt Size Chart

Size Collar Shoulder Chest  Sleeve 
XS 14.5" 18" 40"  33"
S 15" 18.5" 41" 34"
M 15.5" 19" 42" 35"
L 16" 19.5" 45" 36"
XL 16.5" 20" 48" 37"
XXL 17" 20.5" 52" 38"