Nurge Superior quality embroidery hoops made from hard beech wood ~ Fine sanded and hand polished for a super smooth natural wood finish. With a brass screw adjuster. Available as 8mm, 16mm or 24mm ( 1″ ) Deep. Please note sizes are taken across the Middle between the inner and outer hoops.   Imperial (inch) sizes are approximate. These products are not suitable for use by children under 8 years of age. They can be used by children over this age with adult supervision, for the purpose they are intended.