Early adopters of Apple’s white iPhone 4 have reported a noticeable difference in thickness between the white iteration of the iPhone 4 and its black counterpart.  TiPb’s assessment found that the white edition is just about 0.2mm thicker than the black model.
Tests using a multitude of cases found that a few felt “just a tad tight.â€
Apple lists the thickness of both the iPhones as precisely 9.3mm (.37 inches) on their official website.
While the cause of the increased thickness remains unclear, some have suggested that a new paint mix is contributing to the difference. Multiple sources reported earlier this year that Apple had developed a new paint material for the white iPhone 4.