Every baby is unique as is their fit in BB Butts Diapers. Sizing weights are estimates to use as a guideline.
Small 7lbs to 13 lbs
Medium 13 lbs to 25 lbs
Large 25 to 35 lbs
If you are concerned, please feel free to contact me prior to ordering for exact measurements or, provide measurements of your child and I will provide guidance on the best option for you.
As an example, my son at 20lbs fits a medium with the tabs meeting in the middle so I expect he will go WELL past the 25lb guideline in his.
I am happy to work with you to have a good fitting diaper!