Brass Cube Beaded Link Chains, Cadmium Free & Nickel Free & Lead Free, Unwelded, with Spool, Real 18K Gold PlatedSize: link about 0.08 inch(2mm) wide, 0.08 inch(2mm) long, 0.01 inch(0.2mm) thick, square: 0.71x0.08 inch(18x2mm), 0.81 inch(20.5mm) between link and square.