Most likely if you have Photoshop and the desire to make your own wallpaper for your iPhone, you really only need to know that creating files in 320 x 480 pixels will give you the ultimate wallpaper size. But just in case you want a step by step tutorial on how to create one, check out this link. This tutorial was found on a site of Photoshop tutorials.

Don’t have Photoshop? Don’t worry. Here’s a tip in the “duh” category: any image sized to 320 x 480 pixels will be perfect size for your iPhone. Or just take a picture and set it as your background. Anyone wanna make some iPhoneMatters wallpapers?