Hi，The size in the photo is measured manually with deviation (ranged) at 0.1-0.5MM. Before you place the order, please confirm the size first. If you don't know how to measure the size, you can ask the supplier of the wheel hub caps of the sizes, including Outer Diameter, Inner Diameter and Length of Clips. O.D=55mm I.D=52mm Product:O.Z M582 Material: ABS+Aluminum Pack: 4 pieces/set