#1 (2.75mm X 7.00mm), 0.2gr , For fine thin bracelet, chains..etc
#2 (3.50mm X 8.40mm), 0.3gr , For fine thin bracelets, chains,..etc
#3 (3.80mm X 10.20mm), 0.5gr
#4 (4.35mm X 11.40mm), 0.6gr
#5 (5.22mm X 13.70mm), 0.9gr
#6 (6.27mm X 16.00mm), 1.5gr
#7 (8.08mm X 16.10mm), 2.3gr , For thick and wide items, heavy duty
#8 (9.02mm x 18.30mm), 2.9gr, For thick and wide items, heavy duty
WHICH ONE TO BUY?
Usually, the clasps are narrower than the item itself. For example, for a 12mm wide bracelet, a 9mm clasp is usually used. For items around 6mm, you can go for 4mm or 5mm clasp, both will work just fine. You can also get a bigger clasp than you need , this is all personal preference.
NOTE: We have these clasps in 14K as well, please visit our store.