The sizing chart refers to actual body measurements in inches.
Garment measurements are larger to allow 'EASE' of fit.
ADULT XS S M L XL 2XL 3XL 4XL 5XL
 T-Shirt (chest)   32" 35" 39" 44" 48" 52" 56" 60"
 Long Sleeve Performance T-Shirt (chest) 34" 38" 41" 45" 49" 52" 56" 60"  
 Sweatshirts (chest)   34" 38" 44" 46" 50" 53" 57" 61"
 Jackets (chest) 36" 37" 40" 43" 47" 52" 54" 58"  
 Pants (waist)   31-32" 33-34" 35-36" 37-38" 39-42"  44-46"  48-50"  52-54" 
 Pants (inseam)   31.5" 32" 32.5" 33" 33.5" 34" 34" 34"
LADIES XS S M L XL 2XL 3XL
 T-Shirt (chest)   30" 34" 38" 42" 46" 48"
 Jackets (chest) 31-32" 33-35" 36-38" 39-42" 43-45" 46-49" 50-53"
 Leggings (waist) 26" 27-28" 29-30" 31.5-33" 34.5-36.5" 38" 39.5"

YOUTH XS S M L XL 2XL
 T-Shirt (chest)   27" 29" 30"    
 Long Sleeve Performance T-Shirt (chest)   27" 30" 32" 34"  
 Sweatshirts (chest)   27" 29" 31" 33"  
 Jackets (chest)   26-27" 28-30" 31-32" 33-34"
 Pants (waist)   26-28" 28-30" 30-32" 32-34"  
 Pants (inseam)   16" 20" 24" 27"