Nurge high-quality Square (rectangular) ABS Plastic Embroidery Hoops are perfect for most styles of needlecraft, embroidery & cross stitch. They make it easy to sew into corners. There is a notch in one hoop that fits into a groove on the other that keeps the fabric firm when sewing.
 
No. 2 Square Frame 145mm(5.7")x 165mm(61/2") x 10mm
No. 3 Square Frame 195mm(7.7")x 220mm(8.7") x 10mm