The size is 28cm. I wore them about twice, but I'm selling them because they're too small. They are close to new and I think you can still wear them, but please understand that they are used items that have been worn about twice, and purchase them after confirming the condition in the photos. Please note that there may be oversights due to amateur inspection. Please refrain from purchasing if you are sensitive to details. Regarding shipping, I will make it as compact as possible, and will choose either Rakuraku Mercari or Yu-Yu Mercari delivery. Instant purchase is OK. Main color...Red Model name...500~600 series Model/Product name...574