Native Treasure Violet Oyster Shell Puka Shell Necklace Surfer Beach Puca Choker - 5mm (3/16") Size Is Selectable. If you want to make sure that you have the right length for your Necklace just add 1" to 2" to your shirt collar size, so it will fit as a choker. 5mm (3/16") Super Class 'A' Quality Violet Oyster Shell Heishe Puka Shells Hand-Crafted in Our Philippines Tropical Jewelry Shop by Our Own Tribal Native Island Artisans Includes FREE Upgrade to Durable Stainless Steel Beading Wire Cable, Sturdy Easy-On Twist-Barrel Lock for Clean Look Exclusive One Year Free Breakage Replacement 100% Satisfaction Guarantee