These are American size 16/17, so I believe they are approximately 10.5 cm in Japanese size. These were given to me by a relative. I believe they are unused. Please understand that this is a foreign product. I think the condition is good, but because I am an amateur, I may have overlooked some stains or other imperfections. Please be sure to check all the photos before purchasing. Please purchase only if you understand that these have been stored at home. Please refrain from purchasing if you are sensitive to such things. They will be compressed and shipped in simple packaging. ☆Instant purchase OK☆