I've only tried green kids out of those and have found they are a bit wide for my 4mo (although she is quite petite). There is no way I would have used them from birth, it's only been the last 3-4 weeks that I've been able to put them on her, I'm hoping that I'll get the value out of them as she grows bigger as they should do her through to tt. I also found terry flats to big for her as a newborn. We mainly use itti bitti's or bbh with a few other odd ones thrown in