I had to add a pocket to the pajama pants I made for DD. I cut two 6.5" squares being careful to check for directional fabric and get them in the right orientation. I sewed them right sides together on three sides, clipped the corners, turned it right side out. I turned the edges of the open end in to finished the square and I make that side the bottom of the pocket. I position the pocked on the top of the right hand leg and sewed it to the leg on three sides. It looks good and now you can tell the front from the back of the pants. I added pockets to each of the pants I made for myself.