Sizes of iPhone UI Elements

Window (including status bar) -> 320 x 480px

Status Bar -> 20px

View inside window(visible status bar) -> 320 x 460px

Navigation Bar -> 44px

Nav Bar Image -> up to 20 x 20 px (transparent PNG)

Tab Bar -> 49px

Tab Bar Icon > up to 30 x 30 px (transparent PNG)

Text Field -> 31px

Height of a view inside a navigation bar -> 416px

Height of a view inside a tab bar -> 411px

Height of a view inside a nabber and a tab bar -> 367px

Portrait Keyboard height -> 216px

Landscape Keyboard height > 140px

References:

• Sizes of iPhone UI Elements
• The UIBarButtonItem Class Reference says “Typically, the size of a toolbar and navigation bar image is 20 x 20 points.”
• The UITabBarItem Class Reference says “The size of an tab bar image is typically 30 x 30 points.”