At first glance, it's thick enough for a Maryland winter. Not so thick you'd think they were slipper socks, and not so thin you'd think you'd punch a hole in them. My 4 year old is a short guy so they come up to halfway up his calf and that works well for us. I like the variety of colors because they can be combined with outfits, occasions and seasons. I will definitely be ordering more in other colors!
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