The inside dimension of this hoop is 4″ x 6 (102mm x 152mm)
Actual sewing area is approximately 3.23″ x 5.2 (82mm x 132mm)
Fits: Brother PR Series 1 needle, 6 needle, and 10 needle embroidery machines includingBrother PRS100 Embroidery Machinesand Brother PR1055X Multi Needle Embroidery Machines.