New IKEA Gullingen Beige Cushion Cover Indoor/Outdoor 16" x 26" - 603.940.61 | eBay
Amazon.com: Acanva Premium Throw Pillow Inserts with Microfiber Filled, Lumbar Support Decorative Stuffer for Sofa Bed Couch & Chairs, 16x26, 2 Count, White : Home & Kitchen