Chintz (noun) – a usually glazed printed cotton fabric
“I wanted one downstairs that opened on the piazza and had roses all over the window, and such pretty old-fashioned chintz hangings! but John would not hear of it.” (Gilman, pg. 2)
I understand that the word chintz is used to identify that a curtain, that is made out of cotton, and that it has designs on it. It was in one of the rooms that she liked that John did not approve of because there wasn’t enough room to his liking.