The Extra Large Embroidery Hoop EF81 has a maximum embroidery area of 10.5" X 6.25". This is the hoop to use for those larger designs. This Hoop can be used with a Brother NV4000D and 4500D, however we recommend that you update this model to version 2.02 or later. This update insures that you will not embroider outside the embroidery area of this hoop.