This 14k yellow gold box chain necklace measures 20 inches in length and 1mm in width. The box chain construction creates a square-shaped link pattern that's known for strength and flexibility.

At 1mm wide, the chain is delicate but visible, and the 20-inch length typically falls below the collarbone on most people. It closes with a spring ring clasp. The necklace works on its own or as a chain for pendants, and the width can support lightweight to medium-weight charms.