I ordered William Morris curtains and also requested cushion covers. The material feels like cotton. There's a zipper hidden from view. It's about 37cm in both length and width, so a 35-37cm cushion might fit well. Because it's small, it's a cushion designed to be enjoyed as part of an interior, paired with a 45cm cushion to create a contrast in size. I've hardly used it and have been storing it. I hope to pass it on to someone who likes it. Thank you for looking. ZARAhome