green sprouts Baby Snap Reusable Swim Diaper

My son is about 20-21 pounds but his legs are pretty slim compared to other 7 month olds, he's just very tall. What size do you think I should go with

My son is in 18m and most 24m clothing. what size would you recommend? some 18m is too tight. this also has to go over a disposable swim diaper. answe

My son wears size 4 diapers, and size 12m pants, hes 14m 30 inches and 21lbs. What size swim diaper?

Does this swim diaper prevent poop leaks as well as urine leaks?