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Knox Men's Base Layer Sizing

Size Chest (in) Waist (in)
SM 35-37 30
MD 38-40 32
LG 41-43 34
XL 44-46 36
2XL 46-48 38
3XL 48-50 40
4XL 50-52 42
5XL 52-54 44

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

How to Measure

  • C Chest
    Measure around the fullest part of your chest, under the armpits, keeping the measuring tape parallel to the ground.
  • W Waist
    Measure around your natural waistline, around the top of the hip bones, inline with the navel while keeping the measuring tape parallel to the ground.
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By purchasing and enrolling in Riders Preferred Membership, you agree to the Program Terms and Conditions. *Some exclusions apply: 10% RPM discount applies on full price and sale price Exclusive Brands. 10% RPM discount applies on additional select brands at full price. Exclusions apply. RPM free 2-day shipping applies on qualifying items, contiguous U.S. only. Not available for AK, HI, or U.S. Territories. View shipping policies. RPM free returns apply on qualifying items and are processed on standard return timeline, contiguous U.S. only. View return policy.