It's roughly 14" wide. It doesn't seem to be perfectly rectangular, but unless your flashlight is outrageously thick/deep, it should fit fine. I've put an iPad 2 in there (almost 10" x 7" x .5", in its case) and while it gets tilted up when I close the sloping front of the glovebox, it fit fine. Of course, you could stop by the store in Scottsdale and check the fit directly. ;-) Any excuse!