Hide your valuables in this "safe" that looks like an ordinary curio shelf - the last place a thief would think to look. This is an actual shelf with a hidden drawer. The outside dimensions of the shelf are 17 7/8 inches x 5 5/8 inches x 7 3/8 inches. The inside dimensions of the drawer are 13 5/8 inches x 3 inches x 1 1/4 inches. Easily mounted.