Surf Surfer Coco Wood Bead Cord Necklace With Large Curved Carved Bone Pendant - Adjustable Surf Surfer Coco Wood Bead Cord Necklace With Large Curved Carved Bone Pendant - Adjustable. The necklace is adjustable from approximately 38 to 76 cm (15 to 30 inches). The bone pendant measures approximately 4 cm in length. Please note that the pendant size and shape may vary slightly from the picture as no two are the same.