Unused and stored. The size is 39, but the undersole is 24 cm, so please use that as a reference. I have a different color of this, and it's 24 cm, which fits comfortably barefoot. Just for reference. I purchased it from the Fuko store. I believe it was a German product, but I'm not certain. It's light and easy to wear. Although it is unused, please refrain from purchasing if you are overly concerned about minor details.