Main Stone:Obsidian Model Number:fine jewelry for women Shape\pattern:Square Style:Classic Metal Type: Silver Metal Stamp: 925 Metal: Silver Item Type:Rings Item Weight:1g size 5 (diameter): 15mm /0.58 (about) size 5.5 (diameter): 15.5mm /0.6 (about) size 6 (diameter):16mm / 0.62 (about) size 6.5 (diameter):16.5mm / 0.64 (about) size 7 (diameter): 17 mm / 0.66 (about) size 7.5 (diameter): 17.5 mm / 0.68(about) size 8 (diameter): 18 mm / 0.70 (about) size 8.5 (diameter): 18.5 mm / 0.72 (about) size 9 (diameter): 19 mm / 0.74 (about) size 9.5 (diameter): 19.5 mm / 0.76 (about) size 10 (diameter): 20 mm /0.78 (about) size 10.5 (diameter): 20.5 mm /0.8 (about) size 11 (diameter):21 mm / 0.82 (about) size 11.5 (diameter): 21.5mm /0.84 (about) size 12 (diameter): 22 mm /0.86 (about) size 12 .5(diameter): 22.5 mm /0.88 (about) size 13 (diameter):23 mm/0.90(about) size 13.5 (diameter):23.5 mm/0.92(about) size 14 (diameter):24 mm/0.94(about) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin