So the other day I noticed a small hole in the bottom of my pannier, its large enough to lose keys thru. Its right on the bottom panel. Now since im tight on cash, and the panniers overall are in good shape, I'm hoping to be able to just sew/patch the hole.

Anyone ever done this, have any suggestions to best go about this?
Was thinking of sewing what I could and maybe using an iron in patch, but I'm unsure my iron will fit