Purchased a 4-pack of place mats for organizer portfolio but found them too "wimpy" for a crisp cover so instead made a zippered make-up bag with my first ever zipper insertion!! Mind you, I didn't really know what I was doing but I found a blue zipper in my stash. What the hey, let's give it a try.
Sewed grosgrain ribbon on each side of zipper for a wider top.
Love the dimensional space that a boxed corner provides. See interior and exterior photos.
How to box corners HERE.