Christopher James of London Specialists in Fine Personalised JewellerySolid 925 Sterling Silver Curb Chain - Available in Lengths of 12" to 40"1mm : Very fine chain suitable for lightweight Pendants or worn on its own(weight 09 to1.3 Grams, depending on length) 1.2mm : Fine chain suitable for lightweight Pendants or worn on its own(weight 1.2 to 2.3 Grams, depending on length) 1.4mm : Ladies chain suitable for most Ladies Pendants.(weight 2.5 to 5.1 Grams, depending on length) 1.6mm : Ladies / Mens chain suitable for most Pendants weighing up to 20 Grams(weight 2.8 to 4.1 Grams, depending on length) 1.8mm : Mens / Ladies chain suitable for most Pendants weighing up to 30 Grams(weight 3.4 to 8.9 Grams, depending on length) 2.1mm : Mens chain suitable for most Pendants weighing up to 60 Grams(weight 4.8 to 8.9 Grams, depending on length) 2.5mm : Mens chain suitable for most Pendants weighing up to 100 Grams(weight 6.1 to 11.9 Grams, depending on length) Available With our Without Gift Box