|Yes, that is a functional pocket.|
I'm not going to give any instructions...but I will say that the finished dimensions are about 5 1/2 by 9 inches and I used a 20 (ish) inch long zipper. I plan on taking this little baby with me on the plane Monday.
TSA website and it says that while I can't carry on a meat cleaver or an ice axe, I can carry on "scissors-metal with pointed tips and blades shorter than four inches." I think I'll print that up to show the screeners if they get snippy with me. I'll just fold it up and slip it behind the scissors in the handy-dandy pocket.