DS has been in 3's for what seems like forever. Recently he has been having blow outs but it only seems to happen when he's sitting in his high chair or something like that. I'm hesitant to buy a larger size because the 3's still fit well in the waist. Do I need to go with a larger size anyway?
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Re: Diaper size question
He's always had a skinny butt and legs. He wore newborn diapers for almost 2 months and was almost 7 lbs at birth