Blazing Needles 16x16-inch U-Shaped Chair Cushions (Set of 2) - 16 x 16 - On Sale - Bed Bath & Beyond - 8856275
Sunbrella 20 x 18 solid fabric seat pad(2 pack) - 20"W x 18"D x 2.5"H - Bed Bath & Beyond - 30970385
17" x 18" French Edge Wicker Outdoor Seat Cushion (2-Pack) - 18undefinedundefined L x 17undefinedundefined W x 3undefinedundefined H - Bed Bath & Beyond - 35374672
Classic Accessories Montlake FadeSafe Water-Resistant Contoured Patio Dining Seat Cushion, 18 x 18 x 2 inch, Heather Indigo - Walmart.com
18" W x 17.5" D Outdoor Universal Seat Cushion Textured Solid Almond (2-Pack) 21313S-201A135 - The Home Depot
17 in. x 18 in. Indoor/Outdoor Lounge Chair Cushions in Preview Lagoon (Set of 2) HD535721SC - The Home Depot
Amazon.com: Honeycomb Indoor/Outdoor Stripe Poolside Quilted Chair Cushion Set, Seat and Back, Weather Resistant, Stylish, and Comfortable Patio Cushions, Seat: 17" x 17" x 1.5"; Back: 17" x 18" x 1.5" :