Sterling silver ring features a delicate whale tail with a heart accent facing a lab created deep blue opal. Band is 1.2 mm thick. Whale tail is 10 mm across. Hawaii designer Peggy Waterfall, HonuHeart Designs, uses only high quality 925 sterling silver precious metal. The surface is hand polished for an exceptional shine and all edges are smoothed for comfort. Adjusts 1/2 size up or down.