How old is bub? A OSFM isn't really ideal if she is a newborn - as I discovered the hard way!
Mind you I have a tutto and it folds down teeny, with tiny leg holes so it might be worth a shot. Plus the poo fence XD

I know someone who has one for her five week old and she says it fits.

They're less bulky than other OSFM too. My DS is narrow and his fits great, soaks up alot of wee. I'm quite smitten with it

I have recently fallen in live with abbygros too. So nice and soft yet they are a good strong quality. They are also a OSFM.

GL!