Metal: 18k Gold PVD and Platinum PVD Plated on Stainless Steel This bracelet is a fixed length and can't be adjusted. If you prefer a looser fit, we recommend sizing up. XS/STotal Chain Length: 6.2inchChain Width: 5mmWeight: 8.6gS/MTotal Chain Length: 7inchChain Width: 5mmWeight: 8.8g M/LTotal Chain Length: 7.8inchChain Width: 5mmWeight: 10.2g Water-Resistant 316L stainless steel Anti-tarnish Sweatproof Hypoallergenic Product Code: SST-GS-B4-NS