Men's:

Size (US)	Chest (in.)	Waist (in.)	Arm Length (in.)	Neck Circ. (in.)
XS	33 – 35	27 – 29	31 – 32	14 – 14.5
S	35 – 37	29 – 31	32 – 33	14.5 – 15
M	37 – 39	31 – 33	33 – 34	15 – 15.5
L	39 – 41	33 – 35	34 – 35	15.5 – 16
XL	42 – 44	36 – 38	35 – 36	16 – 16.5
2XL	46 – 48	40 – 42	36 – 37	17 – 17.5

Youth:

Size	Age / Numeric Size	Height	Waist
XS	6/7	47.5″ – 50″	22″ – 23″
S	8/9	52″ – 57″	25″ – 26.75″
M	10/12	57″ – 61.5″	26.75″ – 28.5″
L	14/16	65.625″ – 66.5″	30″ – 31.5″
XL	18/20	67.5″ – 68.5″	33.25″ – 35″