Take vinyl leather of 12” x 8”. Cut the top of each piece by measuring out the middle and 2 inches down on each side and then cut to the middle. The new measurement now on each side is 10?.
Cut the interfacing smaller than the bag. Measure and cut off about 1/4 inch from each side.
Next fold over and figure out button placement and attach button. Now cut out a couple strips of elastic and sew onto the inside of your bag with the interfacing attached, this will help keep the interfacing in place.
Now glue on the other side. Glue as close to the outside as possible and then put glue in the middle as well so you can glue the other side of the interfacing to the back of the bag.
Lastly design the bag with gold spray paint.