It fastens with a secure lobster clasp. To fit wrists up to: 16.5 cm (6.5 in) Overall length: 18.3 cm (7.2 in) Width: 4.4 mm (0.17 in) Material: 9ct gold Weight: 7.48 g (0.26 oz). The bracelet carries multiple marks including 9KT to the joint tabs, a 375 stamp to the clasp, and a London assay office hallmark in the international style typical of the 1980s.