Add a stylish backyard complement to your patio with this 38.5in square umbrella base. A charming, low-profile design stays out of the way of foot space, whether under a table or freestanding. This base is built tough with heavy-duty, rust-resistant steel for a sturdy base that lasts for years to come. The steel tube with secure fit tightening knob provides the perfect fit, as it fits umbrella poles with diameters between 1.5 and 2 inches (1.5 in, 1.7 in, and 2 in umbrella pole adapters are included to adjust from 1.5 in to 2 in). It also provides an easy assembly 1. Add a bolt, 2. Insert the metal plate, and 3. Screw in the knob. Plus, four anchor holes are pre-drilled for securing the base directly to wood decks or patios. An umbrella is a lot less valuable without the perfect stand to keep it standing tall. For reference, the overall product dimensions are 24.5""(L) x 24.5""(W) x 14""(H).