Need a little extra length on your bracelet or necklace? These extensions hook directly onto a fold over style clasp to add almost an extra inch. Each extension measures 3/4" long. The width of the clasp is about 3mm. The opening the clasp hooks onto is about 4mm. If you are purchasing this to be used on your own jewelry, please measure the clasp width as these will not work with a clasp larger than 3mm wide. Multiple can be purchased and hooked to each other to extend the length as long as you need. Choose from silver, gold or rose gold.