I washed them, but I'm not sure if I wore them once. I think they are size 18-20, but they might be size 15-17. Please check the photos. [Size Chart] Extracted from the internet Size / Corresponding Size (Approximate) / Height (from heel seam to opening) 9 / 9-11cm / 10.5cm 12 / 12-14cm / 14cm 15 / 15-17cm / 15.5cm 18 / 18-20cm / 16cm