Wheel Cap

[cwk8412]

Does anyone know what is the wheel cap size for 3rd gen Toyota Yaris? Thinking of buying aftermarket wheel cap, but not sure if it is a 57mm or 60mm?
Mine comes with a 15 inch stock Toyota wheel which looks like the wheel below



http://www.hubcaphaven.com/mm5/graphics/00000001/2015_toyota_yaris_rim_lg.jpg