Hi the size in the photo is measured manually with deviation (ranged) at 0.1-0.5MM. Please take off the protective film above the sticker surface before use. It's not the scratch or defects. Please note it. TKS! Condition : 100% Brand new Model NO.: M582 Material : PPE+PA Outer diameter : 55mm Inner diameter :52mm Placement on vehicle : front / rear / right / left Quantity : 4pcs Feature : durable, fit for replace your broken one,enhance the characteristic of your wheel Fitment : for universal car Note : 1.There are total two sizes of center wheel hole you have to measure. First is the Outer Diameter(O.D), second is the Inner Diameter(I.D). Or you can measure the old wheel center caps you have, also both the Outer Diameter(O.D) and the Inner Diameter(I.D). 2.We provide clear pictures ,measurement where possible.Please check as much as possible to make sure the item the one that you need. 3.The actual item maybe has slight color distinct with listing image due to different computer screens ,thanks for your understanding. 4.Not manual instruction in the package .Professional installation is High Recommended. Package included : 4 x wheel center hub caps