The Mighty Hoop is a strong magnetic hoop, which can be used on almost any embroidery machine. There is no need to adjust the outer ring of the hoop, because it holds the garment with magnetic force, and automatically adjusts for different thicknesses. Mighty Hoops reduce hoop burn, and stress on arms and wrists. You can hoop the impossible with Mighty Hoops, even Carhartt!
The inside dimension of this hoop is 4 1/16" (4.062", or 103mm)
Actual sewing area depends on brand of machine
approximately 3 1/4" (3.27" or 83mm)