Material of shark teeth is 44.5-49.4 mm length, Real Lower tooth only. Like gemstone, very hard, snow great white and beautiful shape. Handmade hawaiian shark tooth necklace was recognized as a symbol of protection and strength, Symbolically for Men, Boys, Women, and Girls Handmade silver wire winding. Core diameter is 5.0 mm. Black cord chain is 50 cm (19.5 inch). Rope necklace can be made into shorter necklace with glue and knife. 19.5 size is better for adults. Collection Megalodon Shark Tooth can be used separately as Adults Jaws decor display, shark boy games, marine biology for kids, shark game books and national geographic kits. Necklace of Shark tooth would be slightly vary on shape and size, Each is Unique. Best gifts for Father, Friendship, Business gifts, Beach vacation and congratulation days.