This is the second time I've used this template, and this template is for sale in my Etsy shop.
Print the card on card stock, and the envelope on paper. The card will hold US money in the pocket. Sort of like a billfold.
I made these in 300 ppi, click on the images for the full sized versions, and print at 300 dpi for the right size.
If you cover the wallet/card part in packing tape it also makes a nice play wallet.