Wholesale Prices in Price Matrix. You will be impressed with the quality for this low price. Each necklace is strung with genuine puka shells. PLEASE NOTE: most of the time the shells run the same size. Upon occassion there are some necklaces strung with some larger size puka shells. The shell sizes are consistant in size on the same necklace. Each necklace fastened with a barrel clasp. Length 16".