18k Gold Adjustable. 5.1mm. 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 the figure 8 links of this chain. Made and hand-finished in LA, each piece sold helps ocean-related causes.