IF YOU HAVE ANY QUESTION, PLEASE FELL FREE TO CONNECT ME FOR HANDMADE PRODUCTS,IT IS NORMAL FOR THE SIZE ERROR TO BE WITHIN 2’’(5cm)! Multi-colors 16’’/18’’/20’’ Soft Seat Pad with Ties,Soft Sherpa Chair Cushion,Plush Sofa Cushion,Fleece Seat Cushion,U-Sharp Chair Pad ITEMS: Chair Pad; SIZE: U-sharp; Square:1616’’ Square:1818’’ Square:2020’’ SHIPPING TIME: We need 1-2 weeks to made your order, & then it will cost about 1 week on the way. NOTE: Machine washable. IF YOU HAVE ANY QUESTION, PLEASE FELL FREE TO CONNECT ME I can accept cancel the order,but you need to connect me within 24 hours after you purchase the order; But,i can’t accept return or exchange after you receive the parcel:) Multi-Colors 16’’/18’’/20’’ Soft Seat Pad With Ties, Soft Sherpa Chair Cushion, Plush Sofa Cushion, Fleece Cushion, U-Sharp