This vintage inspired sterling silver disc has a really unusual studded surround. It measures 2.5cm in length (including the jump ring) by 1.75cm in width. It hangs on a sterling silver curb link chain .You can chose the length of your chain, either 50cm or 50cm but remember the 50cm chain has a 45cm length option within the same chain (please see detail in product photos). It seems to work well on all lengths, so take your pick!