18k Gold Adjustable. 1.8mm. 16” Adjustable to 15” & 14”18" Adjustable to 17" & 16"20” Adjustable to 18” & 16”24" Adjustable to 22" & 20" Our Charms and Coins are designed to clip around this chain. Charms and coins will slide along this chain, and will not remain stationary. If multiple charms are worn, they will fall together at the bottom of the chain. Comes standard on our large coin necklaces. Made in Italy.