Round concrete base is a substantial 35 lb. size and will hold umbrellas with the following pole diameters: 1.25", 1.5", or 1.75" poles. Overall dimensions: 17" D. x 12" H. No. SL-USC-01B: Shape: Round, Material: Concrete, Color: Black, Height: 12", Diameter: 17" No. SL-USC-01C: Shape: Round, Material: Concrete, Color: Tan, Height: 12", Diameter: 17" No. SL-USC-01A: Shape: Round, Material: Concrete, Color: Bronze, Height: 12", Diameter: 17"