1. cut the horizontal lines. the opening will be for the sleeves. 2. flip it inside out and sew the vertical lines on both sides. cut off the extra fabric. 3. use fray check on the seam of the sleeves. that's it! it's easy as 1,2,3! you just pull it over your head and you're ready to go. oh i made the belt using the extra fabric i cut. or you can use a belt you already have.