1. Cute Exclusiv Customization:ThreeDimensional Relief Portrait of Dog on The Front. Dog's Name can be Engraved on the Front and Contact Info (Up to 4 Lines) can be Engraved on The Back. All Numbers, Letters and Symbols (Bone, Round, Heart, Flower, Badge, House, Star, Rectangle, Bow, Paw, Tie and More ) are Supported. Deep Black Lettering, Clear Engraving and Never Fade 2. Material:Made of Solid Copper ( Brass). Designed by Illustrious Designers Meticulously Crafted by Famous Craftsmen Using Coinmaking Craftsmanship. WearResistance, ScratchResistance, BiteResistance and DeformationResistance, Can be Wore for a Very Long time. All Accessories are Also Made of Materials 3. Perfect Size Design:There are three size options available: S (Diameter 30 MM/1.18 Inches for puppies or small dogs), M (Diameter 35 MM/1.38 Inches for medium dogs) and L (Diameter 40 MM/1.58 Inches for large dogs). They are lightweight, 14g±, 20g±, 28g± respectively, and will not be a burden for dogs. You can choose the most suitable charm collar dog tag according to your dog's size. 4. Easy To Customize:Steps to complete customization: First, click the 'Customize Now' button. Then click the 'Dog's Name' button and input your dog's name. Next, click the 'Continue' button. After that, click the 'Custom information' button and input address/emergency information/essential medical data/loving messages etc. Finally, click the 'Add to Cart' button to complete the customization.