Bought to fit cushion cover which measures 51x51cm thinking it would work but in fact the consistency of this cushion pad makes it much smaller than it's given size (50x50cm) so it doesn't fill out the cushion cover at all leaving the cushion to look like a sack of potatoes. It's not worth returning for a refund because I will have to pay for delivery again. Contacted customer service which were very helpful but found out that while I can exchange for a similar item I will still have to pay for delivery unless I add to the order to go over £40. So I have decided to keep the cushion pads (bought 2!) as it still works out cheaper this way and I will buy the pads which properly fit my covers elsewhere.