The size is 27.5cm. I'm selling these because they're too small for me now. They can still be worn, but while there are no major scratches or stains, they do show signs of wear. Please understand that this is a used item and purchase after confirming the condition in the photos. I am a private seller, so there may be oversights. Please be aware of this. Please refrain from purchasing if you are overly concerned about details. Regarding shipping, I will pack them as compactly as possible and will choose either Rakuraku Mercari or Yu-Yu Mercari delivery services. Instant purchase is welcome. Main color: Blue