I ordered 2 sets of the largest size.  The dimensions given on this website are the overall size or the actual size of the top. When I ordered I thought that they would be a little too deep for my space, but the cubes are smaller than the size given. Actual size of the cube is 10.25"H X 12"W X 16.25"D which worked better for my space. Like others have said the color is NOT gray, it is beige...well the inside is gray. I will keep them anyway since I have beige in my bathroom, so no biggie. I love that they have tops, and love them so much I am about to order one more set!  They were delivered in 6 days which was quicker than the order indicated.