Have seen quite a few versions of this out there....there is a cute one with an easel card on top. For this one I basically used a "matchbox" template/design, and added a flap for the card. Finished box was a little longer and wider than 3 inches. I added a small spot of (weak) Velcro to hold the card closed. Here's a good tutorial at "Julie's Stamping Spot."
Since this was a gift for a crafty friend, I made a bunch of shrinky dink embellishments and baubles (for Christmas or crafts) and put in the drawer.