New socks, set of 12 pairs. Length: Approximately 10 cm From heel to toe (actual measurement): Approximately 19 cm There is no size indication, but after comparing them to actual socks, they seem to be around 22 cm to 23 cm. I tried on one pair (don't worry, it's not included in the sale). I can wear them, and I'm a 23.5. The heel area might be about 5 mm small, so I've listed them as ~23 cm. This is just my personal opinion, so please understand. They are not as thick as athletic socks like Adidas. They are for everyday wear.