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      RUTZ Fit System

      Size Guide

      Find your best fit for performance underwear and active essentials built for long days outside.

      ✓

      Fit tip: Our fabric is stretchy. If you are between sizes or want a more supportive fit, we recommend sizing down.

      Men's Boxer Briefs

      6" inseam

      Measurements in inches
      Size Waist (inches) Hips (inches)
      Small27-30"33-36"
      Medium31-34"37-40"
      Large35-38"41-44"
      X-Large39-43"45-48"
      XX-Large44-48"49-52"
      XXX-Large49-53"53-56"

      How to Measure

      01

      Waist

      Measure around your most natural waistline.

      02

      Hips

      Measure around the widest part of your butt.

      03

      Inseam

      Measure from the crotch to the bottom of the hem.

      RUTZ Size Guide - How to Measure

      BTZ™ Collection

      Measurements in inches
      Size Waist (inches) Hips (inches)
      X-Small23-26"34" & Under
      Small27-30"36-39"
      Medium31-34"39-42"
      Large35-38"42-45"
      X-Large39-43"45-48"
      XX-Large44-48"48-51"

      BTZ™ Ridgeline

      Supportive active fit

      Measurements in inches
      Size Bust (inches)
      S31-32"
      M32-34"
      L34-37"
      XL37-41"
      XXL44" & Under

      How to Measure

      01

      Waist

      Measure around your most natural waistline.

      02

      Hips

      Measure around the widest part of your butt.

      03

      Bust

      Measure around the fullest part of your chest.

      RUTZ Size Guide - How to Measure