This "Happy Birthday to the World's Best Dog" Edible Card is a "cute" sentiment on a flat rawhide card. The ink is a non-toxic water based ink, and the design is lively, creative & fun!! We all know people who send dogs paper greeting cards. Why not send one that the owner will love & the dog can then eat … which is also good for him. All cards measure 4-3/8" x 6-3/8" and come with a brightly colored mailing envelope. (YES-they can actually be mailed !!)