O'Neill wet boots. Ninja socks. Size S, which is 25cm on the O'Neill website. Used once. As you can see in the images, there are no noticeable scratches or stains that would cause any problems with use. The neoprene rubber is 3mm thick, and the sole is thin rubber. I've used several types of boots before, and this one feels solid when stepping on the board, and the quality is good, but I'm selling it because the size didn't fit me. Thank you.