Please find below several square market umbrellas in increasing size, from 6 foot up through 10 foot. Umbrellas like these are generally very good for providing shade and rain protection. If you have a square table which you’re looking to provide shade for, a square patio umbrella can be a very good choice. They can also sometimes hug more closely to a flat wall than a more round umbrella could.

6 foot square market umbrella:

8 / 8.5 foot umbrellas:

9 foot square patio umbrellas:

10 square offset market umbrellas:

When getting into the larger sizes the base has to become heavier and often wider to support the increased weight and wind load of the larger umbrellas. An alternative is to affix (e.g. via bolts or screws) the square market umbrella pole to a deck or other fixed object which can withstand the load.