Cut one 5 inch piece of the rough side of the velcro, one 3 inch piece of the soft side of the velcro and a 10 inch piece of your ribbon.
Then, fold both ends of your ribbon in about 1 1/2 inches and sew around the edges in a box shape, like the picture above.
Then, sew the 3 inch long piece of the soft part of the velcro next to one of the folded edges you just sewed up.
Then, place the rough side of the velcro (rough side facing toward you not the oil cloth!) in the middle of the other piece of oilcloth but this time about 3 1/2 inches down from the top edge…see picture above! Use some more tape to keep it in place while you sew!
Then, place right sides of your oil cloth pieces together and sew along the long length of both sides and the short length of the bottom (top left picture). Then, press the bottom corners together with your hand so the cut edges line up and sew across (top right and two bottom pictures).