<p>These sizes are based on height.<b>Please note go up one or more sizes if you are heavier or stronger.</b></p> <p>Kids Small(height:39--47 inch)</p> <p>Kids Medium(height:47--51 inch) </p> <p>Kids Large(height:51--55 inch)</p> <p>Kids X-Large(height:55--59 inch)</p> <p>Adult Small(height:4'7" -- 5'0")     </p> <p>Adult Medium(height:5'0" -- 5'4")  </p> <p>Adult Large(height:5'4" -- 5'7")    </p> <p>Adult X-Large(height:5'7" -- 6'0") </p> <p>Adult XX-Large(height:6'0" -- 6'4")</p> <p><b>Please note go up one or more sizes if you are heavier or stronger.</b></p>