Materials vary by listing. Common base metals include brass, zinc alloy, iron, and copper (sometimes marketed as hypoallergenic). Many pieces feature gold plating—examples noted are 14K gold over brass or other gold‑tone finishes—and several listings specify nickel‑free or lead‑free construction.
Overall lengths reported range roughly from about 11.5 inches up to 20 inches. Most layered necklaces include an extension chain—commonly 2–3 inches—to allow for adjustable fit between the layers.
Many are sold as two‑chain (double) or three‑chain (triple) sets. Some single‑piece necklaces are manufactured with multiple fixed chains built into one design to reproduce the layered look.
Common finishes include polished gold plating or gold‑tone coatings. Several items specify plating grades such as 18K or 14K gold plating, and some are described as 14K gold over brass or similar treatments.
Several listings note hypoallergenic construction and describe materials as nickel‑free and lead‑free; some specifically use hypoallergenic copper or treated brass bases with gold plating. Because formulations vary by item, check the product listing for material and allergy information before buying if you have sensitive skin.