The dimensions for the den show to be 15X19. Here is a link for the MLS print out with all of the room dimensions and additional information. (you may need to copy and paste the link into your browser) Be sure to double click on the photo to see all of the additional pictures too!
I hope this helps. I'd be glad to help you with any other questions or information you have need. Feel free to call or email me anytime.
Direct (405) 818-6760