Welcome to my Craft Room. I was asked to make a Box Envelope for my friend Marla. I was given the measurement of 5 12" X 7 12". I haven't made my own Box Envelope, because it is easy to make a box, with an acetate lid. This was a wonderful challenge for me. I first had to find a card that measured close to Marla's card, and one that had a lot of embellishment's on it as well. haha I found both, and started this journey. I couldn't fine my Martha Stewart triangle to use the MS Score Board, but did have my WAMK Envelope Punch Board to use for this project. I figured it out however, that whatever the depth is you have, just add 1/4 " to it, then score. I said 1/2" all the way through the video, but it is 1/4" added to the depth of your card.....hahaha I do hope this helps to view what I am trying to do .....Huge Smiles here. It was a wonderful challenge for me, instead of using boxes all the time for my deep embellished cards. Yay!