As Shown: 12" dia x 6"H x 7.5" fixed height; Ceiling Plate: 4.5"Ø x .25"D 15.5"Ø x 5"H x 6.5" fixed height; Ceiling Plate: 4.5"Ø x .25"D 19"Ø x 5"H x 6.5" fixed height; Ceiling Plate: 4.5"Ø x .25"D 24"Ø x 6"H x 7.5" fixed height; Ceiling Plate: 4.5"Ø x .25"D 30’’Ø x 6’’H x 7.5” fixed height; Ceiling Plate: 4.5”Ø x .25”D