Size Guide

How to choose the right size

Crazy Arms sleeve sizing

Upper-Arm Width (Bicep)

Measure around the bicep with arm straight.

Check against the ranges below.


Measure from wrist bone to arm pit

Age Guide for Kids

Is a guide only - kids do grow at very different rates!

Crazy Arms kids sizing chart


Adults - Regular or Relaxed Fit?

Crazy Arms are designed to fit like a second skin for athletic activity. 

This should feel a little tight on first wearing, but will ease to a snug fit after one or two wears. 

* If you are using Crazy Arms for activities with high arm movement (eg golf, tennis, cricket, sailing), we recommend the "Regular" Fit up to a 32cm bicep. 

This will help ensure the upper elastic band keeps the sleeve in place.

We offer a free size exchange on sizes for un-worn Crazy Arms.

    Crazy Arms adults sizing chart