SIZE(INCHES)	XS	S	M	L	XL	XXL
CHEST CIRCUMFERENCE	36	38	40	42	44	48
ACROSS SHOULDER	17	18	19	20	21	22
COLLAR SIZE	13 1/2	14 1/2	15 1/2	16 1/2	17 1/2	18 1/2
WAIST	28	30	32	34	36	38

COLLAR SIZE - Measure where the base of your neck where the shirt collar would sit
ACROSS SHOULDER - measure joint-to-joint from shoulder tip to shoulder tip
CHEST CIRCUMFERENCE - Measure around the chest
WAIST - Measure the around the natural waist line, usually the shortest width of the torso