CNATTAGS Swarovski Crystals Pet ID Tags Personalized Various Shapes Premium Aluminum Bone Size: 1.25 inches x 1.05 inches. 3.2 cm x 2.7 cm. Thickness: .046" (1.17 mm) Permanent Engraving With LIFETIME WARRANTY Exclusively by CNATTAGS Stainless Steel Split Ring Included TO COMPLETE YOUR PURCHASE: Please Click "CUSTOMIZE NOW" Permanent Personalization Enclosed split ring Shapes: BONE, HEART, Colors: Black, Blue, Pink, Purple, Red, Grey Bone: 1.6 inches x 1.1 inches. 4.0 cm x 2.7 cm. Thickness: .046&#034; (1.17 mm) Heart: 1.25 inches x 1.05 inches. 3.2 cm x 2.7 cm. Thickness: .046&#034; (1.17 mm)