Step 1:
http://grabcad.com/library/iphone-4-4s-white-black-versions-available.
I also attached a picture of all the measurements of the case itself.

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Besides that, great final product.
great design!
http://www.instructables.com/id/The-ultimate-all-in-one-iphone-case-wallet-money/
It doesn't really show every step clearly but I believe that was what I was asking for. Thanks.
Can you please tell me which 3D printer is this? Printing resolution looks very impressive.