They should fit, but it'll be tight. My ds was born pretty much into smalls, but we did have some nb proraps - we only used infant pf's and my dh basically shoved the diaper in there to make it work! I bet if she folds them down in the back, and then maybe bikini twists them to narrow down the crotch, they'll fit better than say a newspaper fold. Is her babe not here yet? Does she have a teddy bear/doll she can try the combo out on first to check and see?