Hoop frames are circular structures used primarily in sewing and embroidery. They hold fabric taut, making it easier to stitch designs accurately. These frames come in various sizes and materials, including wood and plastic, and can be adjusted to fit different fabric types. In addition to sewing, hoop frames are also popular in crafts like cross-stitch and quilt-making. They help maintain consistent tension on the fabric, which is essential for achieving neat and even stitches. Using a hoop frame can enhance the quality of the finished project and make the crafting process more enjoyable.