This Happy Garden Black Square Patio Umbrella Base (Model # a091-006-001-044) features 4 fillable interlocking tiles that provide stability for standard patio umbrellas. The tiles can be filled with sand or water for added weight. Condition is like new and item is in original box. Specific dimensions were not provided at time of listing — please inquire in store for measurements. A great budget-friendly solution for patios, decks, and outdoor spaces.