Earthbound Pacific Hand Carved Stylized Zealand Maori Nacre Pikorua Twist Beautiful, Delightfully Smooth, Iridescent, Nacre Pikorua Two Lives Necklace Comes on a sleek, one size fits all, comfort cord that can be adjusted to a variety of lengths. Approx. Size: 4.0cm (40mm) L X 2.2cm (22mm) W/ INCHES: 1.57 L x .87 W NACRE is the substance found inside a variety of mollusks, to include the pearl oyster, from which pearls are formed; aka mother of pearl.