Geometric black and beige triangular series Throw Pillow Case Cushion Cover Decorative Cotton Blend Linen Pillowcase for Sofa 18 "X 18 " (4) &iexcl;&shy; Geometric black and beige triangular series Material: Cotton linen ,Invisible ZipperFront Print ,back without any design Size  18 x 18 inch (45 x 45 cm ,sometimes it have 1-2 cm error) Only have 1 pc pillow cover ,not include insert ,you need to buy it yourself ,i think 20 inch insert will fit well . You can wash it with MachineCold Water is ok . Item not Fade not stainBeautiful Style will decorate your room more vitalitywe will list more listing to match Kinds of Room Decoration style