An 11 ft patio umbrella provides a substantial amount of shade and looks great. Well constructed umbrellas of this size can be quite heavy, and given their large surface area they will need a large and heavy base to stop the wind from blowing them over. An example of an 11 ft patio umbrella is shown below.

Big market umbrellas such as these make an impressive addition to a patio or back yard. This post may be of interest to those looking for 11 patio umbrella.