Gracie Tags are cute dog tags you can add to accessorize your dog's collar. It is used with permanent vinyl and the names will not rub off. There are diffrent sizes the large is about 6 centimeters and the Small is 4 centimeters. I recommend the small tag for dogs under 8 pounds. DISCLAIMER Every Tag will be diffrent and not exact. A common and uncontrollable aspect of resin is air bubbles and slight bumps which are unavoidable however, i do my best to get rid of them when noticed.