I absolutely love this brand of booties and its all my baby wears, but I wish I had known the regular knit ones run a size small compared to the fleece ones. We had 0-3mo in the pink fleece. I just received this black pair of 3-6mo and they are the same exact size. (See photo) I will try stretching the black ones when wet but these definitely will not last until my baby is six months old. I shouldve ordered 6-9 mo.