Upper compartment interior 24"W x 9"D x 19-1/4"H Lower compartment interior 20-3/4"W x 21"D x 23-1/4"H Monitor window opening 18-1/2"W x 15"H Work surface 24-1/2"W x 13"D Overall unit 24-1/2"W x 22-1/2"D x 62-3/4"H