These socks appear to be well made, although the sizing is very small. According to the description, size M should fit children between 10 and 13 years old and they do not fit my 10 year old who wears size 5 shoes. The length is also short, not reaching the knees at all, and also very tight-fitting. He is of average height and thinner for reference. In general I see that it is suitable for shoe size 4 max. and possibly 9 or younger children of average height and quite thin. Hope that helps. Oh yes, the first package "lost" was delivered to a "safe location" and the 2nd package arrived but unfortunately is being returned.
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