please pick adults size and kids size individually
 back and neck self tie closures. high waisted bottom.
adults comes with removable soft cup
Mommy size S to XL
Kids size 2T-8Y

Adults size chart
Size small cup A/B, bust 34, waist 26
Size medium cup B, bust 36, waist 28
Size large cup C, bust 38, waist 30

It has pretty durable elastic