measurements you took in step 1. leave an extra half inch for the hem on the batting.
lay your fabric out, inside out with the right sides of the two pieces of fabric facing each other. lay the batting on top. lay out your arm pieces separately using the same method. pin the hems along three edges and sew using your sewing machine. trim each seam with the scissors.
turn all pieces right side out. place your weights inside your last seam. place a weight every few inches along the edge of the seam and pin around each weight to keep it in place. you can use weights in your arm pieces 