Unisex FR Hoodie Sizing:

Eric is 5'9" 155lbs and wears a Medium

Size Chest Length
S 2012" 2714"
M 2112" 2734"
L 2212" 2812"
XL 2312" 2834"
2XL 2412" 2914"

Chest - Lay the garment flat, start 1" below the armhole seam right where the armpit ends and measure across the chest from the right side to the left side.
Length - Measure from the center of the neck seam down to the bottom hem.