Size: 38.91 X 38.91 X 8 inches Fill at least 50% with sand and completely fill with about 330 Lbs of sand and water Made of PP plastic, real hard and weather resistant, extension of time of use 3D surface design, easy to clean ONLY for PURPLE LEAF offset patio umbrella; ESPECIALLY for 12 feet square umbrella, 10 X 13 feet rectangular umbrella and 13 feet round umbrella Protection Plan: 1 year for offset umbrella base With this umbrella base, your offset patio umbrella can be more stable. With this umbrella base, your offset patio umbrella looks more fashionable. With this umbrella base, your offset patio umbrella gains more stability. With PURPLE LEAF products, your garden life becomes more wonderful.