Design and Create a Case for the iPhone, iPad, and iPod
Do you want to design a case for the iPhone? No problem thanks to Apple! A new page on Apple’s developer website contains full dimensional drawings with all the measurements necessary to quickly and easily design a case for the iPad, iPhone, or iPod.
There are over 25 dimensional drawings of the iPhone/iPad/iPod product line to help you get started. Even if you’re not a designer looking to create the next coolest iPad case they are still fun to look at the detailed pictures.
Apple Developer: Designing Cases for iPod, iPhone, iPad
Apple never ceases to amaze me, their entire product line emphasizes creativity and then they take it a step further by doing things like release these drawings, making it even easier to create for their product line-up.