An umbrella with an 11 foot shade diameter will cover up to 60 inch round or square dining table and 72 inch oval and rectangular tables with 6-8 chairs. The most important thing to know when purchasing an umbrella of this size, whether it is a round or a rectangular patio umbrella is that it will need a pretty heavy umbrella stand in order to keep it in place. In most cases, umbrellas of this size will need to be placed through a table and placed in a stand that weighs at least 50 lbs and the heavier the better. Understanding the features of umbrellas is particularly important when you are purchasing a large patio umbrella. Some features that will help add to the enjoyment of your outdoor umbrella are: a crank lift system, pulley lift system, tilt option, wind vent and warranty.
When using umbrellas in this size category for a residential setting a crank lift system or a pulley lift system are really great features to look for because they assist you in opening and closing the umbrella. Some even come with a crank tilt feature that allows you to tilt the umbrella simply by a few rotations of the crank which makes it a breeze.
Wind vents are another nice option because they allow air to flow through the umbrella cover which helps keep things cooler under the umbrella and also when unexpected breezes show up, but even with a wind vent, it is very important to close your umbrella when you are not present so that if a strong wind comes, you will not risk breaking or bending your umbrella. You may also find wind resistant umbrellas that are made with fiberglass ribs that are able to flex in strong winds and help protect your umbrella.
If you are looking for something a little smaller, take a look at our 9 ft to 10 ft outdoor umbrellas.