In case anyone down the road is looking for this info, 11 inches x 6 3/16 inches with 1/2 inch radius rounded corners gives a snug fit with enough give to accommodate the screws and controls in the back but leaving plenty of room for the lip to rest on the tabletop comfortably. If you are table mounting and there will be felt and padding you may want to allow for a little more room but this is a good starting point.