Card Carrier Wallet With Key Storage

I decided to try to make a card carrier with key storage. Others exist, but the key compartment usually isn't universal. This should hold any standard thickness key regardless of shape. You can even carry two depending on key style. Alternatively, you can use the storage for money or anything else that fits.

You just use two hair bands to hold it together. The edges didn't snag on any clothes, but I'd still like to round them out a little.

I've included two versions. One is a blank model