Inner portion of light (i.e. your hole must be at least this size): 1 - 13/16" tall x 6 - 5/16"
Mounting holes are 6 - 15/16" on center
Total Flange dimension: 2 - 1/2" tall x 7 - 5/8" wide
Perfect for off-road or on-road driving visibility or as a general work light. This is really a combo beam. See pictures, but it does throw a lot of wide light as well as long.