A bobbin is a small, cylindrical object used in sewing and textile manufacturing. It holds thread or yarn, allowing it to be fed smoothly into a sewing machine or weaving loom. Bobbins come in various sizes and materials, including plastic and metal, depending on the specific application. In sewing machines, the bobbin is typically located beneath the needle and works in conjunction with the upper thread to create stitches. Properly winding and inserting the bobbin is essential for achieving consistent and high-quality stitching in projects involving fabrics like cotton or polyester.