The standard size for a patio door depends on the style, with hinged versions measuring 71 1/4 inches by 79 1/2 inches and sliding door versions available in three basic sizes. Patio doors are typically available in two- and four-panel configurations.
Sliding doors are the most common ones used for patios. Sizes to choose from include a 60-inch door with a frame size of 59 1/2 by 79 1/2 inches; a 72-inch door with a frame size of 71 1/2 by 79 1/2 inches; and a 96-inch door with a frame size of 95 1/2 by 79 1/2 inches. Sizes vary depending on the manufacturer, but generally are standardized to industry specs.