This clock was made using a recycled bicycle crank gear and a new quarts drive movement. The clock measures approximately 8.5" in diameter. It would make a great conversation piece on your wall or great gift for that biker you know who is so hard to shop for. Since these clocks are made from actual recycled bike parts, there will be marks, scratches and imperfections. It runs on 1 AA battery (included). Handmade in the USA. Thanks for looking.