Round Shaped Dog Cat Pet ID Tag Custom Engraved Acrylic Plastic 6 Colors & 3 Sizes to Choose From (Message Seller with Engraving Information) Nighttime safety reflectors are included on the back of each pet tag Please enter your custom engraving info in the Gift Message section of your order or email us via Amazon email Small (1" x 3/8") Medium (1-1/8" x 1-1/2") Large (1-1/4" x 1-11/16")