Specifications: <br> Material: Wood, Stainless Steel. <br> Multiple Size: 4in (10.1cm), 6in (15.2cm), 8in (20.3cm) and 12in (30.4cm). <br> Package Includes: 4 X Wood Embroidery Hoops <br> 1 - 4 inch Embroidery Hoop <br> 1 - 6 inch Embroidery Hoop <br> 1 - 8 inch Embroidery Hoop <br> 1 - 12 inch Embroidery Hoop <br> How to use the embroidery hoop: <br> 1. Loosen the screw and take off the outer hoop, lay flat the inner hoop, put the cloth on the inner hoop, then put the outer hoop on the inner hoop. <br> 2. Flat the cloth and tighten the screw.  <br> 3. Use a needle going through the fabric surface over and over to inspect the hoops whether they are tight enough. <br> 4. Ensure there are no pleats or warp on the fabric when using the needle and finally tighten the screw.