Janome Circular Sewing Attachment | 202107000. The circular sewing attachment is ideal for sewing circles using straight stitch, zigzag, decorative stitches or even lettering. Circles up to 26cm in diameter are stitched perfectly using this popular attachment so essential for craft and decorative work. Approx Settings Upper thread tension : Auto or standard Needle : 11/75 Presser foot pressure : Reduce the pressure slightly