Home Decorators Collection 23" Wide Snow Drift 9/16 in. Light Filtering Corded Cellular Shade (48) 23 in. W Actual Blind Width is 22.625 in. NOTE: This blind is 0.375 in. (0.95 cm) narrower than the order size (or the size shown in the box) For an Inside Mount, fits windows: 23 in. Wide For an Outside Mount, order 0.5 in. wider than the overall area to be covered Energy efficient with excellent insulation qualities White backing for clean street-side appearance