Downtown Tulsa’s BOK tower (Built in 1977) is the tallest office building with 52 floors and 667 feet in height and 1,140,684 sf in total size. CityPlex (Built 1981) is a close second in total height with 648 feet and 60 stories (each story is slightly shorter in height in comparison with BOK Tower and Devon Tower), but CityPlex is larger in total size with 2,200,000 sf. Devon Energy Center (Devon Tower) in Oklahoma City is the tallest office building in Oklahoma with 50 stories and a total height of 844 feet with a total size of 1,800,000 sf.