This colorful acrylic wall clock measures 10 inches. It is easy to hang and operates on an AA battery (battery not included). We were lucky enough to acquire several of these pharmaceutical promotion clocks and customized it with our greyhound label "Greyhound Saving Time". Note: If you are a greyhound rescue group and are interested in a minimum of 12 clocks, we would be happy to replace our website address with yours. Contact our office at 215-331-7918.