Standard two-panel sliding glass patio doors come in total widths of 60 inches (5 feet), 72 inches (6 feet) and 96 inches (8 feet). Some makers offer three-panel sliding doors that are 108 inches (9 feet) in total width, and 144 inches (12 feet) in total width. The most common height for sliding glass patio doors is 80 inches (6 feet 8 inches) tall, but some manufacturers offer doors that are 82 inches (6 feet 10 inches) tall and 96 inches (8 feet) tall.