Hi Judy
Great questions. I'm not personally familiar with the hoops for the Brother Quattro, but I can tell you that hoops usually do measure larger than the dimensions by which they are called. We usually call hoops by the size of the embroidery field, rather than by the size of the actual hoop, and most hoops have a non-embroiderable margin. So it makes sense to me that your hoop measuring 9.5x 14" would have an 8x12 sewing area.
I also wasn't able to find crosshairs at quite that size, so I suggest that you use the crosshair design is nearest in size to 8x12 (I think 6x10 is the largest one available), stitch one and then use a pen and a ruler to extend the lines so that they reach the appropriate spots on your hoop.
Judy D.
I just bought the 8x12 hoop. I can't seem to locate a crosshair design for this size hoop. I need a pes file for Brother Quattro. My other question is my hoop measures 9.5 x14????