CNATTAGS Dog Tags Pet Tags Personalized Premium Aluminum Bone Size Regular: 1.6 inches x 1.1 inches. 4.0 cm x 2.7 cm. Thickness: .046" (1.17 mm) Size Extra Large :2 inches x 1.25 inches. 5.08 cm x 3.17 cm. Thickness: .046" (1.17 mm) Stainless Steel Split Ring Included TO COMPLETE YOUR PURCHASE: Please Click "CUSTOMIZE NOW"