OSFA - One Size Fits All – OSFM - One Size Fits Most
- OSFM or OSFA are acronyms that mean nappies designed to fit your baby from birth through to toilet independence. – One-Size Fits Most Nappies mean not having to sort out sizes. – OSFM nappies will be used more extensively, so you will need a more in your ‘stash rotation’. (More shopping!) – You’ll need to adjust snaps for sizing; find out how to do this.