Composition: Stainless Steel; 18k Gold Plated Necklace Measurements: Chain Length - 16.5+2.5'' Link Chain - 10mm x 4mm x 1mm 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!