These are warm inner tabi socks to be worn under tabi. Please refer to the first photo for details. They are free size, supposedly for 22-25cm feet, but I recommend them for people with regular to smaller-sized feet. I just bought these this month and tried them on. My feet are 24cm long, slightly narrower than average, and I have a low instep, but they were tight, and the elastic around the ankles was also snug. I can't easily go back to the store where I bought them, and it would be a waste to just keep them, so I'm putting them up for sale. I hope someone will be able to use them. Also, they are shown on a cardboard foot form, and it looks like they can be worn on either foot. I also tried them on after taking a bath, with my feet clean.