These are thin socks. The photos appear black or gray, but the actual color is navy blue. I think you'll be able to see a little bit of your skin through them when you wear them. I removed the tags, but they are unused. I stopped using them because I realized the size of the elastic at the opening didn't fit me. I think they would fit someone with slightly narrower feet, so I hope you'll consider them. Color...Blue系 (Blue-based) Sock Length...Mid-calf to knee-high