- Fold each sleeve in half lengthwise, right sides together, and pin along the edge

- Sew the sleeve seam with a straight stitch, 1 cm from the edge. Don’t forget to backstitch at the beginning and end, and trim any excess threads
- Raw edge version: Overlock the entire seam using a zigzag stitch or a serger. Overlock both layers of fabric together, and if needed, even out the edges with scissors before overlocking
- Turn the sleeves right side out and press, flattening the seam well along the length