A word of caution about stick-on center caps, on my particular wheel covers the central cap area is slightly domed which matches the domed adhesive underneath the center caps themselves (
THESE ones that We ordered anyway) thereby ensuring the sticky surface fully contacts the wheel cover center domes, while some stick-on caps are totally flat which matches Other wheel covers with the flat center domes. Hope the way I wrote it makes this concept understandable, otherwise you will have center caps flying off later. This is mentioned in some of the Amazon reviews about the domed cap shape vs flat.