Machine Pilates socks, 23.5 cm, 2 pairs Open toe design with rubber soles. Purchased during a two-week trial period. Please note that these are not sold individually. I subsequently canceled my membership, so each pair was only used about four times. However, there are some initial frays at the toes. I believe they won't affect use. (See photos 6 and 7) These are used items, so I would appreciate it if those who don't mind would consider purchasing them.