Natural Wood Embroidery Hoop With Round Edges. Embroidery hoops are great for working all kinds of crafts. Once the project is finished, embellish the edges with lace, paint, gems or other such materials and use it as a display frame. This package contains one round-edged wood embroidery hoop that measures 4 inches in diameter. Hoop thickness: 11mm. Imported. WARNING: Drilling, sawing, sanding, or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood.