Luxe pillow cover by Pier 1 has a velvety-raised Paisley design and satin cord-like trim. The care tag was removed so my best guess is that the material is a poly-cotton blend. The flat measurement is 17 x 17.5 but I would use either a 16 x 16 or an 18 x 18 insert.

Please see the photos and ask any questions before bidding. Thanks for looking!