In the United Kingdom, the recommended standard parallel bay size is 2.4 metres (7.9 ft) wide by 4.8 metres (16 ft) long. Recently there has been some controversy about most UK parking spaces being too small to fit modern cars, which have grown significantly since standards were set decades ago.
As an example, a lot is 100 feet by 100 feet, which equates to a total square footage of 10,000 square feet. The resultant of 10,000 divided by 325 is approximately 30 — meaning the final design of the parking lot should accommodate about 30 vehicles.