Size Guide

Selfie Leslie is AU/UK Sizing (USA Junior Sizing)

SIZE US  UK  AUS FR  ITY
XS 2 6 6 34 38
S 4 8 8 36 40
M 6 10 10 38 42
L 8 12 12 40 44
XL 10 14 14 42 46
XXL 12 16 16 44 48

More sizing details here.