The small Sea Urchin ring is the smallest member of the family and measures approximately 1 cm in diameter. The medium Sea Urchin ring measures approximately 1.5 cm in diameter. The large Sea Urchin ring It measures approximately 1.7 cm in diameter. The extra-large Sea Urchin ring is the largest in the family and measures approximately 2.3 cm in diameter. You can choose the finish between glossy or oxidized. Each ring is made of sterling silver and handmade in our workshop in Mahón, Menorca.