G-SIZE5

 Size Age Hip(in) Length(in)
S 8-10 28-29.5 10.2
M 10-12 30-31.5 10.6
L 12-14 32-33.5 13.0
XL 14-16 34-35.5 13.4

The sizes are manually measured with error from 0.2 to 0.8 inches.