Dimensions: When closed, 8-1/2" W x 3-1/4" L x 1" H, and when opened, 8-1/2" W x 9-1/2" L x 1" H. This pan box does have a cover. When the box is opened, the top acts as a mixing tray for your paints. the center section can be used for storing brushes. It holds up to 24 half pans of w/c paint. This box weighs less than a pound. It also has a fold out palette for mixing. This box does not come with any extra accessories. It is constructed of enameled steel. The outside of the box is painted black, and the inside of the box is painted white.