CNATTAGS Dog Tags Pet Tags Personalized Premium Aluminum Heart Size Small :0.96 inches x 0.79 inches. 2.4 cm x 2.0 cm. Thickness: .046" (1.17 mm) Size Large :1.25 inches x 1.05 inches. 3.2 cm x 2.7 cm. Thickness: .046" (1.17 mm) LIFETIME WARRANTY Exclusively by CNATTAGS Stainless Steel Split Ring Included TO COMPLETE YOUR PURCHASE: Please Click "CUSTOMIZE NOW"