I wore this a few times last year, but it's too small for me this year, so I'm selling it. It has buttons on the side, so I used to put it on my child before they could roll over. It's labeled as 70 cm, but my child is of average build and it fit perfectly when they were around 65 cm. They were able to wear it starting about a month after they were born. (I only wore it a few times because it was hot and we didn't go out much.)