This is an original vintage accessory Economy Rear Window Shade 434.  Nice condition, never been installed-see photos.  Measures approx 35 1/2" long across the bottom, approx 38" long across the middle(longest point), approx 28 1/2" long across the top and approx 16" tall-see photos.  This fit the best in a 1949-52 Chevy Fleetline-see last photos.  Not sure of other years or makes this may fit.  Please check my other auctions.