This long double square necklace is adjustable, and can be worn between 28.3/4" and 30". The larger rounded square pendant piece measures approximately 1.5/16". The smaller piece tucks neatly within, and measures approximately 1.3/16". Materials: 14k gold-fill (14k gold over brass core/no nickel) and sterling silver (.925). All materials are hypoallergenic. Please note: Metal Madness sale items don't qualify for discount -- but you can use CMD BUCKS on them! All sales are final.