I made a couple for my dd out of fleece and she loves them. No more blankets to worry about. She just wears a onesie underneath. I've made both sleaveless and with sleaves. When sewing, sew the front and back togerther at the top, leaving the side and bottom open, then attach the open sleave. Once you have the arms attached, sew one continuous seam from wrist, up the arm, down the side, around the bottom and back up. Hope this makes since. It really is an easy project.