A Gainsborough chair (also known as a Martha Washington chair in the United States) is a type of armchair made in England in the eighteenth century. The chair was wide, with a high back, open sides and short arms, and was normally upholstered in leather.The dimensions are 66 cm wide x 98 cm high x 66 cm deep and the seating height is 51 cm . ( 26 inch wide x 38,5 inch high x 26 inch deep x 20 inch seating height )