This adjustable 6.5" to 7.25 " sterling silver flat round multisized circle charms on a charm bracelet is very unusual! I had never seen it before. The links are 4 mm long by 3 mm and the circles range from 14 mm in diameter to 20 mm in diamter. The clasp is a nice toggle clasp and the loops at the end are 10 mm in diameter. You can decide which loop to hook the toggle to, to make it adjustable.