Most shirts are Comfort Colors 1717 blanks. Sizes in inches

Small  W= 18.25  L= 26.625

Medium  W= 20.25  L= 28

Large  W= 22  L= 29.375

XL  W= 24  L= 30.75

2XL  W= 26  L= 31.625

3XL  W= 27.75  L= 32.50

Chest Width tolerance  = +/- 1
Body Length tolerance  = +/- 1 1/4



Fahrenheit Headwear caps are are adjustable to size from 56cm to 61cm in circumference.