Hawaiian Clam Shell and Bone Fish Hook Choker 17" Necklace Shell Necklace, ideal for teens. Also very popular among the surfers. 17" choker with small size polished genuine clam heishi shells with a bone carved fish hook pendant. * Bone pendant measures approx. 1 1/2" L x 3/4" W Twist barrel heavy duty clasp. * Made in the Philippines.