Below you will find a sizing chart to help your child choose the correct size violin or viola.  The measurements are taken from neck to middle of palm, with the arm fully extended.

 

Violin  Viola
Neck to middle of palm Size Neck to middle of palm Size
14" 1/16 24.75" 15"
15.25" 1/10 25.5" 15.5"
16.75" 1/8 26.25" 16"
18.5" 1/4 27" 16.5"
20.25" 1/2
22.25" 3/4
23.5 4/4