Have been looking at the motherease covers as they are so cute but a wee bit confused about the sizes. It says the x-small is for 2.5-5.5kgs but it also says the small is for 2.5-5.5kgs. The x-small is slightly cheaper. For those of you who have used them do you know if there is any difference between the 2? Do they work for a newborn over flats? I got some tots bots covers and they look absolutely huge and won't be able to be used for a while. Thanks.
