There is a picture of this piece on page 115 in the book: John Townsend Newport Cabinetmaker by Heckscher, published by The Metropolitan Museum of Art with the dimensions given as 34 5/8 X 37 3/4 X 20 5/8. Are you wanting to build an authentic reproduction or just a close look alike? I'm thinking plans are going to be hard to find! Good luck. John McAlister