New Visual Proportions for the iOS User Interface ← Principia Arbiter“The 44-pixel block is, in many ways, the basic unit of measurement for the iPhone interface, establishing the visual rhythm of many iPhone apps. That metric is significant as the recommended minimum size to make a tap target (like a button or list item) easily and reliably tappable.” The quote above is taken from Josh Clark’s book Tapworthy, an authoritative book on iPhone UI design. Apple’s Mobi
