Monica Vinader Siren ring in Green Onyx. Stunning ring Excellent condition. Only wore once Size : I US size : 4.5 but still fits like size 6 for my ring finger of left and right hand both. Comes with a box w/ ring holder :) A stacking must-have. Hand cut gemstones mean this ring is slightly different each time, but gorgeous 100 percent of the time. Wear alone or add to your ring stack. Band width 1.3 -1.5mm, depth 0.9 -1.3mm Gemstone length 1.4cm, width 1.2cm