How to Replace Overalls Snap Pockets with a Big Zipper Pocket

This is a do it yourself (DIY) solution in how to replace overall with top snap pockets with a big zipper pocket. Instructions include how to shorten the length of a new metal zipper, add new material (8oz washed denim), and use a seam ripper to remove the center stitches. Thread colors are white, dark blue, and red.