But in the video I made a 2" high one for a more versatile size, to keep or gift square card for example.
If you don't any scraps you can make the box 6"square and 3"high and use the whole 12"x12"sheet.
I used pretty foiled papers from Craft Sensation, but any you have will work, of course.
Start with the bottom piece and add a scrap as a shim.
So for this exact box I show in the video, you need a piece of paper that is 10,5"square.
Burnish and reinforce the scorelines, then notch and if you want add a thumbnotch.
Glue as indicated. FOld the top piece around the bottom one, so it will fit exactly.
Add a pretty ribbon or diecuts, felt flowers etc, whatever you like.