Well. Itti Bitti D'Lishes are pretty cute. Probably a medium, because at 15 weeks she might not get enough wear out of a small. Better a nappy that she can grow into, if anything.

Phoenix is talking about the Baby BeeHinds Magicalls I think, which many people like, I can't comment cos I don't have any of the current ones...yet.

Another option is a pocket nappy - a shell where you stuff the absorbent part either (because you pull them apart you can dry them quicker). GreenKids sell some cute pockets. But you have to buy the inserts separately.