green sprouts i play. Boys' Reusable Swim Diaper, Aqua Simple Dino, 18 Months

What is the weight for a 24 month old reusable swim diaper?

How much should i size up for my 10 month old daughter? she's about 19 lbs and 27 inches. should i get 18 month or 24?

Where is the size of the product description? Don’t see it and there isn’t an option to pick sizes/colors

Should use swim nappy (Pampers) under this swim pants?