So, as I mentioned above, I like to use my adhesive sparingly. The original source calls for the use of your adhesive roller/gun, which spaces the adhesive squares very close together. If its tape, it'll be as long as you allow it to be. I approached this portion of assembly differently. So, here's MY take on this simple and really fun tutorial:
1. Trim a large piece of card stock to 4x5.25 inches (or whichever size you prefer). 4x5.25 will work well to mat a regular A2 or 4.25x5.5 greeting card.