I bought the size for 3-5 years; and i would have given these socks 5 stars for the cute patterns and styles but the size difference definitely lowered my rating. My daughter loves socks so 18 pairs are great for her and she loves them. But I have some problems with this package. I have attached several photos of several socks and they are all different sizes depending on the design. Maybe I misunderstood the product information and misunderstood that they increase in size? I don't think I did as I saw other reviews that also mentioned size differences. The smaller socks are about the same size as her now, so she won't be wearing them for long. Larger sizes will work for quite a while as she has room to grow in them. For the record, she is 2 1/2 and is currently wearing a size 8 and is in the process of going up a size. So depending on your daughter's shoe size, she may not wear every pair for a while. I like some that are too big as she seems to grow up overnight and get out of her clothes before I know it. So I find it useful to have big things to carry around. I guess the bottom line is I love these socks but be aware of the size difference before you buy them. I think these are good midweight socks; and it can be worn all year round, but I'll probably have her wear slippers in the winter for extra warmth (assuming she wears them, of course). *Tl; dr* cute socks. Sizes vary by style. Good average weight. I would recommend them but be aware of the sizing issues.
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