[Baby Size] 15mm * 15 Stars ，18mm * 13 Stars， 20mm * 12 Stars
[Proposed] 15mm wearing wrist circumference 15-17 cm for boys to wear， there are some girls like big beads
                      18mm wrist circumference 16-18 cm for boys to wear
                      20mm wrist circumference 17-19 cm for boys to wear