Sofa City Sweethearts tags are a great gift for your favorite four legged friend! They're sealed with resin, to protect from water or scratches and built to last. This item is customizable and your pet's name and your contact information can be added at no additional cost Custom design colors are available upon request. TWIST TAG FEATURES No metal split rings 2 piece set Twists together directly over collar or harness SIZES LARGE (FITS COLLARS/HARNESSES UP TO 1" WIDE SMALL (FITS COLLARS/HARNESSES UP TO 3/4" WIDE GLOW IN THE DARK OPTION- Our new glow option appears translucent/white in daylight. This material displays a green glow in the dark, after being exposed to direct light. The amount & duration of the glow depends upon the amount of light the tag receives. MATERIALS ECOPLASTIC-Our ecoplastic tags are biodegradable, and environmentally friendly.