Attributes:LobsterPolishedSterling silverAppx Weight in Grams by Width/Length: (each item will vary slightly)1.55 mm width: 7 in = 7.06 gr3 mm width: 16 in = 6.4 gr, 18 in = 7.07 gr, 20 in = 8.39 gr, 24 in = 9.39 gr, 30 in = 12 gr3.75 mm width: 16 in = 11.73 gr, 18 in = 13.2 gr, 20 in = 14.67 gr, 24 in = 17.6 gr, 30 in = 22 gr4.55 mm width: 8 in = 8.07 gr, 16 in = 16.13 gr, 18 in = 18.15 gr, 20 in = 20.17 gr, 24 in = 24.2 gr, 30 in = 30.25 gr5 mm width: 7 in = 4.28 gr, 8 in = 4.9 gr, 16 in = 9.8 gr, 18 in = 11.03 gr, 20 in = 12.23 gr, 24 in = 14.4 gr6.1 mm width: 7 in = 4.86 gr, 8 in = 5.54 gr, 16 in = 11.11 gr, 18 in = 12.5 gr, 20 in = 13.88 gr, 24 in = 16.68 gr, 30 in = 20.85 gr6.25 mm width: 7 in = 10.73 gr, 8 in = 11.81 gr, 16 in = 24.75 gr, 18 in = 27.89 gr, 20 in = 31.11 gr, 24 in = 37.43 gr, 30 in = 46.95 gr8 mm width: 7 in = 11.38 gr, 8 in = 12.98 gr, 16 in = 25.98 gr, 18 in = 29.25 gr, 20 in = 32.49 gr, 24 in = 38.99 grOther Specs:Clasp / Connector: LobsterFinish: PolishedItem Weight U/M: gmManufacturing Process: Machine MadeChain Type: RoloMaterial: Sterling SilverPurity: 925