Visit our Sizing page for more details on how to measure your arm. Note that we offer a free size exchange if the product you receive is not a good fit when you first try it on.

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. 

Adult: 

Regular Fit: for people with a bicep measurement 22-30cm 
Relaxed Fit: for people with a bicep measurement 32 - 36cm 

Kids: 

X-Small: Kids under 115cm (under 45”) Ages 2-4 
Small: Kids between 115-135cm high (45-53") Ages 5-8 
Medium: Kids between 135-150cm high (53-59")  Ages 8-11 
Large: Kids between 150-160cm high (59-63”) Ages 12-14 (approx.)
For more information on sizing, click here.