Magnetic Hoop 17"x15.5" | 430x390mm for BAI The Mirror The Vision Embroidery MachinesHow to Add the Hoop to BAI Mirror Embroidery Machine X Center Y Center X Size Y Size R (Radius) 84 15 364 316 30 The hoop sizes refer to the inner hoop dimension for example 17x15. 5(430x390mm) refers to the inner hoop dimension. The actual sewing field is about 15. 7x14. 6(400x370mm),depending on the machine brand and model. For Use With The BAI Machines The Mirror 1201 1501, Mirror M22 The New Vision Vision V22 (not including the OLD VISION 1201