Deminsions for Picture files

Name	Size (pixels)	Platform
Icon.png	57 x 57	Universial application icon
Icon-settings.png	29 x 29	Universial application icon for settings area. Alternative name: Icon-Small.png
Icon-iPad.png	72 x 72	iPad application icon. Alternative name: Icon-72.png Add some smaller (iPad doc: 64×64, other optional 32×32, 24×24, 16×16) custom icons to your project. See comments.
Icon-iPad-spot.png	50 x 50	iPad icon for spotlight search. Alternative name: Icon-Small-50.png iPhone OS trims 1 pixel from each side and adds a drop shadow. The actual size is 48×48 pixels.
iTunesArtwork.png	512 x 512	Universial application icon for iTunes App Store. Uploaded separately to iTunes. It’s included in the app bundle too, file name: iTunesArtwork. In an iPad application iPhone OS uses this image to generate the large (320×320) document icon if it is not supplied otherwise.
Default.png	320 (w) x 480 (h)	iPhone/iPod 2, 3 launch image
Default-iPad.png	768 (w) x 1004 (h)	iPad. Specifies the default portrait launch image. This image is used if a more specific image is not available. Use full size template (768×1024) to design this launch image. The 20 pixels height statusbar is on by default and occupies the top of the screen, aka the 1004 rows vs. 1024.
Default4.png	640 (w) x 960 (h)	iPhone 4 hi-res launch image
Optional icons and images:
Icon-doc.png	22 (w) x 29 (h)	Universial document icon
Icon4.png	114 x 114	iPhone 4 hi-res application icon
Icon4-settings.png	58 x 58	iPhone 4 hi-res application icon for settings/search area
Icon4-doc.png	44 (w) x 58 (h)	iPhone 4 hi-res document icon
Icon-iPad-doc.png	64 x 64	iPad document icon (small)
Icon-iPad-doc320.png	320 x 320	iPad document icon (large)
Background-xxx.png	320 (w) x 480 (h) 640 (w) x 960 (h) 768 (w) x 1024 (h)	iPhone/iPod Touch 2, 3 background image, iPhone 4 background image, full size iPad background image, full size. For most projects the status bar is hidden, so use full screen size by default.
Default-PortraitUpsideDown.png	768 (w) x 1004 (h)	iPad. Specifies an upside-down portrait version of the launch image. The height of this image should be 1004 pixels and the width should be 768. This file takes precedence over the Default-Portrait.png image file for this specific orientation.
Default-LandscapeLeft.png	1024 (w) x 748 (h)	iPad. Specifies a left-oriented landscape version of the launch image. The height of this image should be 748 pixels and the width should be 1024. This file takes precedence over the Default-Landscape.png image file for this specific orientation.
Default-LandscapeRight.png	1024 (w) x 748 (h)	iPad. Specifies a right-oriented landscape version of the launch image. The height of this image should be 748 pixels and the width should be 1024. This file takes precedence over the Default-Landscape.png image file for this specific orientation.
Default-Portrait.png	768 (w) x 1004 (h)	iPad. Specifies the generic portrait version of the launch image. The height of this image should be 1004 pixels and the width should be 768. This image is used for right side-up portrait orientations and takes precedence over the Default.png image file. If a Default-PortraitUpsideDown.png image file is not specified, this file is also used for upside-down portrait orientations as well.
Default-Landscape.png	1024 (w) x 748 (h)	iPad. Specifies the generic landscape version of the launch image. The height of this image should be 748 pixels and the width should be 1024. If a Default-LandscapeLet.png or Default-LandscapeRight.png image file is not specified, this image is used instead. This image takes precedence over the Default.png image file.