This do it yourself tutorial is awesome in that it is two fold. All you will need to do it yourself is a hole punch, a sheet of leather, and a screw stud. It's fast, easy, and the printable template is available free.
But wait, there's more. From the original website, For the Makers, you can find a kit to make this- all you need is the hole punch.
So choose how you want to make this cute envelope- buy the kit and get everything you need in one simple place, or branch out, find your own leather with your own color scheme or pattern and make it 100% your own. Either way, this is a quick project, and deceptively elegant.