I have black wire shelves and I wanted some boxes that wouldn’t be too outstanding and color. These dark gray boxes with an almost solid front or perfect. The boxes hold my food, for example one for breakfast items, one for condiments, etc.  these are big enough to hold several items but short enough to fit on a 14 inch deep shelf. There’s a place in the front to slide in the label. Because their metal in the sides are open wires I’m not worried about dampness developing or mildew.