Metal: Alchemia Lead Free, Nickel Free, Hypoallergenic Baked lacquer finish to protect metal from turning or tarnishing Due to the one-of-a-kind nature of the teeth, the color and shape pattern may vary slightly from the image shown. Trilobite: 15mm x 18mm Amber: 18mm x 20mm Ammonite: 17mm x 21mm Fossil Sand Dollar: 16mm x 19mm Shark Tooth: 21mm x 25mm Dinosaur Bone: 18mm x 23mm Bracelets Adjustable From: 7.25" - 8.25" Handcrafted and artisan made All pieces are stamped or hallmarked for authenticity Casual day and evening wear