This <b>durable metal dog tag attaches flat to your pet's collar</b> providing a secure, permanent way to present your contact info in case your pet is ever lost. These rivet-on tags are ideal for pets that are rough on stuff! <p><b>Choose from 3 metal types:</b> Mirror Finish Stainless Steel, Matte Finish Stainless Steel, or Polished Brass.<p><b>Choose from 3 sizes:</br>Small</b> fits perfectly on cat or dog collars that are 3/8-inch wide, and no more than 1/8-inch thick. It measures 11/32" wide by 1-9/16" long, and holds up to 3 lines of engraving.</br><b>Medium</b> fits perfectly on dog collars that are 5/8 or 3/4-inch wide, and no more than 1/8-inch thick. It measures 9/16" wide by 1-3/4" long, and holds up to 5 lines of engraving.</br><b>Large</b> fits perfectly on dog collars that are 1-inch wide, and no more than 1/8-inch thick. It measures 7/8" wide by 2-7/16" long, and holds up to 5 lines of engraving.<p>Each tag <b>comes with rivets</b> so you can attach your tag to your pet's nylon collar.<p><b>Collar not included.</b> We sell collars separately if you need one.<p>Our tags are so durable that we have a <b>lifetime guarantee</b>.<p><b>To attach the rivet-on tag to your pet's collar, </b>first punch two holes in your pet's collar to match the holes on the tag. Place the tag on the collar and slide the rivets though the matched up holes. Snap the rivet caps onto the rivets. Use a hammer to tap the rivets and caps together until they are closed snugly around the tag and collar. We suggest placing the tag on cardboard or something padded while hammering to prevent damage to the front of the tag<p>*Please note: your engraving info will automatically be defaulted to ALL CAPS unless you write a note specifying otherwise.