My DD is exactly as Gigi described it, really chubby thighs but a small bottom, so she needs double side snaps so we can get the right fit at thighs and tummy and a narrow crotch so there isn't a lot of extra fabric floating around. Not the easiest combination to find in XL sizes.

She sleeps in a wool soaker and I don't think it's too hot on her, at least she's never complained. I'm going to try my hand at knitting some shorties, the most complicated thing I've ever knitted is a scarf so I'll be needing lots of luck.