I was trying to find socks for my 7 months old son and was surprised how difficult it was. Most stuff is for girls, especially in places that are not expensive. These looked nice, low price and I followed advises from other reviewers to  go to the next size up. I got size 18-36 mo and although they were a bit longer than needed but not by much and certainly smaller size won't fit. My boy is about average by weight and 80-90% by height and it fitted him well (a tad longer as I mentioned before). These socks are nice quality, have enough length to stay on longer and colors that boy should wear. I'm glad I found those.