I have found that sizing in these can be a challenge. My daughter, 16 months, is at the ends of her "0-6" month Robeez (which she was not able to wear until she was 9 months old). Even though I anticipated some room to grow in these, they are like flippers on her. Way too big all around. Right now she is about a 3-4 infant shoe size. These are too big all around, not just in length. I'm just going to shelf them for later...it's not like her feet won't grow. On every other level I am happy with our experience with these shoes; so much like walking bare foot. Being in TX in the summer sometimes they are not so great outside as there is not a whole lot of protection when walking on hot ground surfaces.