Unisex 10k Solid Yellow Gold Figaro Chain Necklace For best results, we do strongly recommend using a tape measure to check neck size before placing your order. This necklace is made of solid 10k gold (not plated or filled) and stamped "10K". This classic necklace looks great alone or with your favorite pendant. Chain is 4mm thick, comes in: -18in (weight 6.6g), - 20in(weight 7.2g),- 22in(weight 7.9g), - 24in (weight 8.6g).