Attributes:Appx Weight in Grams by Width/Length: (each item will vary slightly)3 mm width: 7 in = 3.17 gr, 8 in = 3.62 gr, 9 in = 3.96 gr, 10 in = 4.44 gr, 16 in = 6.85 gr, 18 in = 7.63 gr, 20 in = 8.47 gr, 22 in = 9.34 gr, 24 in = 9.72 gr, 26 in = 10.8 gr, 30 in = 12.56 gr3.75 mm width: 7 in = 4.63 gr, 8 in = 5.35 gr, 16 in = 10.19 gr, 18 in = 11.42 gr, 20 in = 12.37 gr, 22 in = 14.21 gr, 24 in = 14.6 gr, 26 in = 16.28 gr, 30 in = 18.64 gr4.5 mm width: 7 in = 6.54 gr, 8 in = 7.22 gr, 16 in = 13.67 gr, 18 in = 15.9 gr, 20 in = 16.98 gr, 22 in = 18.86 gr, 24 in = 21.13 gr, 26 in = 23.45 gr, 30 in = 26.65 gr6.5 mm width: 7 in = 12.97 gr, 8 in = 15.18 gr, 18 in = 32.12 gr, 20 in = 38.1 gr, 22 in = 40.95 gr, 24 in = 45.04 gr, 26 in = 50.64 gr, 30 in = 57.42 gr7 mm width: 7 in = 15.1 gr, 8 in = 17.28 gr, 9 in = 19.29 gr, 18 in = 37.97 gr, 20 in = 44.24 gr, 22 in = 47.16 gr, 24 in = 51.35 gr9.5 mm width: 8 in = 27.99 gr, 9 in = 30.39 gr, 20 in = 67.21 gr, 22 in = 73.56 gr, 24 in = 80.72 gr11.5 mm width: 8 in = 41.36 gr, 9 in = 46.53 gr, 20 in = 103.4 gr, 22 in = 113.74 gr, 24 in = 124.08 grOther Specs:Clasp / Connector: LobsterFinish: PolishedGender: Men'sChain Type: AnchorMaterial: Sterling SilverPurity: 925