3. Now grab one of the tubes you cut. Make sure the cut end is pointing up, and the side you want the outside of the sweater to be is on the inside (you may have to turn the tube inside out). Now divide the tube in half (IN YOUR MIND), then in fourths (AGAIN, IN YOUR MIND). Sew along the outer fourths, starting about an inch down and sewing all the way to the edge. Make sure ONLY AN INCH IS SEWN and the rest of the tube is unsewn. You can either use a machine or hand sew (here I've hand sewn).
13. Step 12. complete. Now sew the long piece (the sleeve) to the big one (the body) by sewing around the edge of the hole. Be careful not to sew the sleeve shut! I recommend you hand sew this part, 'cause I don't know of any machine small enough to do this detail! Then pull up the other sleeve on the other side and do the same.