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I was surprised not to find an answer to this question, maybe is something very simple I somehow overlook : How to get the real size of an UIView after I apply a CGAffineTransform to it? eg. my UIView has size 300 x 200, I apply a scaling transform let's say factor 2 both horizontal and vertical, so the UIView now takes 600 x 400 on the screen, but it's bounds and it's layer's bounds are still returning a size of 300 x 200 ... where do I find the real size of the UIView ? ps. forgot to mention I want to also rotate the uiview. If I apply only scaling CGSizeApplyAffineTransform works great, but when there's also rotation, then it does not work properly. Edit: drawnonward pointed me in the right direction, I just refined a bit the code to compile and here it is : UIView* view = (your view being transformed); CGAffineTransform trans = (view.transform or create a new transformation); CGRect rect = [view bounds]; CGMutablePathRef path = CGPathCreateMutable(); rect.origin = CGPointZero; CGPathAddRect(path , &trans , rect); rect = CGPathGetBoundingBox( path ); CGPathRelease( path ); Now rect.size contains the dimensions of the view with the transformation applied Thanks again to drawnonward

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