Genuine Bolens # 1820453 Tractor Seat . Gilson # 217589, Michigan Seat Co. # 825364. Approx. 20-1/2" Wide x 20-1/2" Long . Back of seat is 11" High . Bolt pattern (4) is 7-1/2" x 5" center to center.  May be some minor blemishes from shelf life. This is an Entire Seat - NOT just an Aftermarket Seat Cover ! Guaranteed Unused part. See photos.