Size: Diameter of the symbol circle: 1.5 cm. Closed version: 5.5 cm in diameter, adjustable to any size you want. , The symbol is 1.3 cm in diameter, the chain is 45 cm long , 6,5cm X 7cm , Diameter of the symbol circle: 1.5 cm. Forza chain long (25 cm) and short (21 cm) available for use.