This card holder will safely hold your key, ID, a couple of bills for emergencies, and a credit card or two.  It's not meant to be a wallet (dimes will fall out of the area between the zipper and the gusset), or a holder for more than 2 house keys (zipper won't close).

There is an attached keyring inside the zippered pocket so you don't loose your keys, but not enough room to put bills in.  The bills go folded into the outside side pocket. [See photo].

It's basically designed to hold the barest of essentials for when you don't really need to use your wallet, and for what it is, it does a good job.