Sizes of iPhone UI Elements

How to detect the current device size (and how to tell if it's an iPhone 5)

Element	iPhone 4S (and earlier)	iPhone 5
Window (including status bar)	320 x 480 pts	320 x 568 pts
Status Bar (How to hide the status bar)	20 pts	20 pts
View inside window (visible status bar)	320 x 460 pts	320 x 548 pts
Navigation Bar	44 pts	44 pts
Nav Bar/Toolbar icon	white icon - up to 20 x 20 pts (transparent PNG)
Tab Bar	49 pts	49 pts
Tab Bar Icon	up to 30 x 30 pts (transparent PNGs)
Text Field	31 pts	31 pts
Height of a view inside a navigation bar	416 pts	504 pts
Height of a view inside a tab bar	411 pts	411 pts
Height of a view inside a navbar and a tab bar	367 pts	455 pts
Portrait Keyboard (English)	320 x 216 pts	320 pts
Landscape Keyboard (English)	480 x 162 pts	568 x 162 pts
Launch Image (Launch Image Sizes for iPhone & iPad)	640 x 960 pixels	640 x 1136 pixels

출처 : http://www.idev101.com/code/User_Interface/sizes.html