Sizes of iPhone UI Elements

ELEMENT	SIZE (IN POINTS)
Window (including status bar)	320 x 480 pts
Status Bar	20 pts
View inside window (visible status bar)	320 x 460
Navigation Bar	44 pts
Nav Bar Image / Toolbar Image	up to 20 x 20 pts (transparent PNG)
Tab Bar	49 pts
Tab Bar Icon	up to 30 x 30 pts (transparent PNGs)
Text Field	31 pts
Height of a view inside a navigation bar	416 pts
Height of a view inside a tab bar	411 pts
Height of a view inside a navbar and a tab bar	367 pts
Portrait Keyboard height	216 pts
Landscape Keyboard height	140 pts