I love the way these look and really like that they have the non-slip element (it’s why I bought these in particular). A few of the socks (the pink ones and grey ones) are much tighter around the leg/ankle, and seem a bit uncomfortable to me. I bought size 1-2 years and my baby is a 13 month old girl on the 50th to 75th centile. I would recommend them, but only if your baby is quite slim.