I LOVED these socks.  They fit my daughter perfectly.  The size stated is 16-36 months.  For reference,  my daughter is 2 years old and wears a 2T clothes.  She has smaller feet for her age and wears a size 6 shoe.  These fit just as they should and I think will fit her in the next size as well.  They have held up well through many washes.  We didn't get all the colors pictured here (I didn't get the polka dot or black and white stripe, sadly) but I am okay with that.  The ones I did get are cute and have gotten tons of wear.  The grippy bottom is also a bonus.  Would buy again