The office stories were intended to contain executive suites. The office suites are generally flexible in plan, arranged in modules around the elevator core. The flexibility of the office stories derives from the wide bays of the superstructures. In general, each of the second through fourth stories has about of rentable office space; the fifth through tenth stories, around ; and the upper stories, around . The interior design was overseen mainly by Johnson, and all materials were custom-designed for the Seagram Building.