ThinkGeek has a set of plates designed by Leah Yael Levy that feature a planet from our solar system on each plate. The Planetary Plates are 10″ in diameter. They are made of melamine, so they aren’t microwave safe. (There’s a bit of confusion as to whether they are dishwasher safe.) You get a set of eight Planetary Plates, one for each planet, for $36.99 from ThinkGeek.