Do your 0000s all have feet in them?? My DD was 7 pound 12 and 50cms long, so should have been spot on for 0000s for a while but she wore one piece 0000s with feet only twice before they were too short for her - some I had bought she never wore because like the others have said, all brands are different. She stayed in footless and two piece 0000s for weeks though.

I've just bought DD#2's "coming home" outfit in a 0000 but it doesn't have feet, just in case! Anything I've bought for this baby that I love that has feet I've bought in a 000 so she has more time in it.