You couldn't even fit a whole roll that you would buy, inside a blade, nowhere does it tell you to use that much. Just buy a single roll, that's enough to do several blades. The "roll" Jay is talking about in his tutorial is a single piece of wrap that he's using and rolling around a dowel, which is going to be more than just a quad wrap, I don't know why you're having so much trouble understanding that. Just get the idea of quad and double wrap out of your head, that only pertains to the Corbin film, you need a lot more of the clear gift wrap than that.

If you get a 30" roll, cut it to length and try just the width of the roll and see how it looks, you can always add more if the blade isn't even enough. If you get a 40" roll, try 3 or 4 feet. It's not rocket science, different people like different amounts. You can see just how Jay does it in his tutorial, since he took lots of pictures during the process.