Composition: Stainless Steel; 18k Gold Plated, Non-Plated (silver tone), Rainbow Plated, or Gunmetal Plated Measurements: Chain Length - 18.25" Chain Width - 5mm CARE GUIDE: Hypoallergenic, 100% water proof jewelry that you can wear without a care! Wear it in the bath, shower, rain, snow, hurricane, pool, ocean or planet mars. Plated using an environmentally friendly process - wear it without any guilt!