In original packaging item, may require some assembly. See link for more details:

Size: 25"*25"*5"

Note: Comparible; different size

https://www.walmart.com/ip/Classic-Accessories-Montlake-FadeSafe-Water-Resistant-Patio-Dining-Seat-Cushion-17-x-17-x-3-inch-Heather-Grey/55584539