I have 13 mo old twins, so I have quite a few pairs of socks, from cheap-o Circo, to mid-line Carter to nicer Trumpettes.

These don't have the cutesie Trumpette design, but quality-wise THESE ARE THE BEST, and without the Trumpette's price tag. They are soft, cushioned, stay put, they don't pill inside the sock (so no fuzzy toes). I've had these for about 3 weeks now, they remain soft and retain their shape after laundry.

Size S is for 6mo-18mo or shoe size 1.5-4. They fit well on my 13 mo olds, who wear size 4. I wish I had found these socks sooner. I will definitely buying these in the next size up in a couple of months, as the girls grow.