For 700C wheels. This is a small, lightweight fender that doesn't spoil the bike's form. Similar fenders were once sold by Giant for around 5,000-6,000 yen, but this one is even lighter because the supports are made of carbon (list price 7,500 yen + tax). I bought this about 5 years ago but never used it, and it has been stored. I only opened it for the photos. Please refrain from purchasing if you are overly concerned about details. It will be shipped in an envelope via Yu-Packet Post.