Riverside Cartop Carriers Deluxe Canoe Block Universal Kayak: 17-7/8" x 4-1/8" x 4-7/8" Deluxe Kayak: 13-3/4"x 3-1/8" x 3-7/8" Universal Canoe: 7" x 4-1/4" x 3-7/8" Deluxe Canoe: 6-3/4" x 3-1/8" x 3-7/8"