Octagon patio umbrellas have eight ribs and eight panels and are one of the most traditionally shaped patio umbrellas. If you are looking for a large-diameter circular umbrella, you will want to choose an octagon shape for the extra support that the added ribs offer over a six-sided umbrella. Octagon umbrellas are available in diameters up to 11 feet and in both residential and commercial grade models. Larger octagon umbrellas are also ideal for round dining tables of 60” in diameter and more which seat 8 to 10 people. You will also find octagon umbrellas poolside where they easily shade three or more chaise lounges.