Compression Socks - 2 socks (1 pair) S/M Size US Size 5-9, which is 23-27cm. Perfect for sports, those who are on their feet all day, or anyone concerned about leg fatigue. Give them a try! Based on my personal experience... I've been wearing these for almost 2 years during sports (using 2 pairs alternately for washing), and they're durable, with no runs or snags. I bought a bulk pack, but I've decided to sell some as I won't need new ones for a while. I have 4 socks (2 pairs) of new ones available, so please let me know in the comments if you'd like them. (¥1,800 for 2 pairs)