Have the child stand with the left arm fully extended to the side, then measure the distance from the neck to the middle of the palm.
Violin Size Arm Length
1 / 4 18” – 20”
1 / 2 20”– 22”
3 / 4 22’ – 23”
4 / 4 23” +
Viola Size Arm Length
10” 18” – 20”
12” 20” – 22”
13” 22 ”- 23”
14” 23” – 24”
15” – 15.5” 25”+
Cello Size Arm Length Height
1 /4 18” – 20” 3.5’ – 4’
1 /2 20” – 22” 4.0’ – 4.5’
3 /4 22” – 24” 4.5 – 5.0’
4/4 24” + 5.0’ & up