How can I make an iPhone 5 case fit an iPod touch 5?

Hey, I bought a iPhone 5 case from a store. They don't sell iPod touch 5th cases. Just iPhone 5, 4/4s and Samsung Galaxy S3. The shop is called Stitches.

When I tried it on, the camera was a little bit blocked, but that's ok.

I tried to make it fit with cardboard. Still kind of loose.

I folded it in half, Too tight.

What can I do to make it a ''Just right'' fit.

I don't mind the wrist thingy getting blocked because I dont use it.