Euro Floating Wall Shelf, 12"W, MAHOGANY Extra small: 1.5"H x 12"W x 6"D. Small: 1.5"H x 24"W x 5.25"D. Medium: 1.5"H x 36"W x 5.25"D. Extra large: 1.5"H x 60"W x 5.25"D.