100% hypoallergenic .925 sterling silver 100% 4ocean Plastic flake (red or blue) 100% ethically-sourced earth elements from Dune’s Sandbank (Florida beach sand or Hawaiian opihi shells) Heart pendant measures 20 mm (approximately the size of a quarter) Adjustable from 16 in. to 20 in. (40.6 cm to 50.8 cm) Handmade with love and sandy hands in the USA® by Dune Jewelry & Co. Made-to-order jewelry ships directly from the Dune Jewelry & Co. studio in Boston, MA. Order early for delivery by Valentine's Day No international orders, cancellations, or refunds. Not eligible for free shipping. Coupons, discounts, and other promotions do not apply.