Attributes:Appx Weight in Grams by Width/Length: (each item will vary slightly)1.3 mm width: 16 in = 1.45 gr, 18 in = 1.55 gr, 20 in = 1.8 gr, 24 in = 1.94 gr1.6 mm width: 16 in = 1.8 gr, 18 in = 2.03 gr, 20 in = 2.06 gr, 24 in = 2.7 gr2 mm width: 16 in = 2.67 gr, 18 in = 2.96 gr, 20 in = 3.33 gr, 24 in = 3.9 grOther Specs:Clasp / Connector: LobsterFinish: PolishedItem Weight U/M: gmChain Type: RopeChain Type 2: PendantMaterial: Sterling SilverPurity: 925