Nice box for a project. Bought a 12x12x4 box. Measurements are external, sides are 1/8" thick, so 1/4" less on the inside. The hinge makes the box appear larger from the outside, as other reviews have mentioned, with the lid's external dimensions being 12.5 x 13. I bought the box without the stand, but it's the same box without the extra piece of plastic, with four coasters in each corner. There are also two mounting holes in each of the corners that have raised ribs around them so the inside of the back of the box isn't entirely flat. Racks and raised tabs can get in the way if you want a flat mounting surface and plan to use all the space in the corners, although they can be sanded down. The door has a slight overlap of approximately 1/2 on the outside of the frame. 2 inches, so the outside space is about 3.5 inches on three sides without a hinge. This limits the installation of items through the side panels in the area that protrudes if you don't cut the door lap. The hinge side panel is about 2.5 inches long before stepping back an additional 1/2 inch for the hinge.
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