gracefulvintage This is note my personal photo but I looks to be a custom built-in... between 48 to 60 inches long ( I would think 60 ) and 24 deep with the upper cabinet clearance of 18 inches.
Hope that helps you!
Whether this office nook is actually located in a kitchen or a hall, it could certainly be part of a beautiful kitchen design. Office nooks incorporated within a kitchen can become great spots to keep up with tasks while not being removed from the room that has become the true center of many homes.
Hope that helps you!