This classic 18K gold overlay box chain necklace is thin and lightweight (approximately .8mm thick), and very comfortable to wear. It is a high quality chain that is made in Italy with the finest standards of craftsmanship. It is crafted of solid 925 genuine sterling silver with a shimmering 18K yellow gold overlay finish. Each chain is stamped 925 and ITALY for authenticity. Our prices are the lowest you will find anywhere because our chains come direct from the Italian manufacturer. Each chain is secured with a durable spring-ring clasp. They are available in a wide variety of sizes from 14" - 40". Please consult the size chart photo for an approximate idea of how each length will fit. The lengths are only approximate, as every individual will have different results based on their actual body measurements. Please note that 14", 15", 16" and 17" lengths are very short, and are not suitable for most adults. We recommend a minimum of 18" - 20" for the average adult.