Performance IDs Lightweight In Case of Emergency Alert Safety Shoe ID Tag with Personalized Engraving Message for Runners, Cyclists, Athletes, Travelers, and Kids Custom engraved message allows for 8 lines of engraving 4 lines on the front and 4 lines on the back with 24 characters per line Weight: 0.17 oz. / 5 g. Plaque Dimensions: 2 x 1/2 Inch Thickness: 1.2mm Composition: Stainless Steel - Polished