Your site did not give the measurement of the back cushion, so I called and the representative gave me the measurements.  After the set arrived, the measurements for the back cushion were nowhere near what the rep had told me.  I was disappointed that I could not use it on the rocking chair for which I had purchased it.  Fortunately, it did fit another rocking chair I had, so I did not return it, but was disappointed that I had been given wrong information.