Frog keychains are available in single and double-sided acrylic mirror. Single-sided, they are 1/8" thick green mirror on one side only. Double-sided frog keyrings are thicker (3/16") with an additional silver mirror on the back side. This makes them even stronger and better looking. It makes a great pocket mirror. And best of all, your name is Engraved FREE!Size: 2 1/4" x 2 3/8"