Follow the steps listed below for the perfect fit You are not alone Here is a link to MARTIN LEWIS MONEY SAVING EXPERT. To get the best possible fit you need a Foam and Dacron combo cushion . The foam offers the support the Dacron provides the fullness required to fill the covers correctly. Step #1 Measuring: Please take a note of the measurements between the seems length, width & thickness. You can enter the sizes in inches or centimeters. These can be entered in to Instant Quote calculator on the home page once you have chosen the shape you require . Step #2 Foam Type: We recommend: Premium Reflex 40HGrade: R40H/180Density: 40 kg per cu/m (Medium /High)Firmness: 180n (Medium Firm)Colour: GreyProperties: Flame Retardant, Melamine FreeRating: “v” Heavy domestic & Contract Grade PREMIUM LUXURIOUS GRADE OF FOAM SIMPLY THE BEST FOAM ON THE MARKET TODAY ESPECIALY IF YOU ARE REPLACING FEATHER OR FIBRE DEEP FILL CUSHIONS GIVEN CONSTANT USAGE. Recommended uses include: Dining Chairs, Headboards, Foot Stools, Window Seats, Bench Seating, Boat, Caravan and camper-van seating and mattresses. Sofa, chair cushions. Highly recommended if replacing feather of fibre filled cushions. Recommended for every day usage. Any application where the foam needs to be medium firm and fatigue resistant. Experience has taught us that this is the best grade of foam to use when replacing both feather or fiber cushions It’ s superior support characteristics make this premium grade of foam our most popular choice for this application. Step #3 Avoiding a common mistake: The most common mistake that the customer usually makes is to assume that the thickness of the boarder on the cushion cover is the finished thickness of the cushion. Our rule is as follows: MATCH THE THICKNESS OF THE FOAM TO THE BORDER WIDTH OF THE COVER THEN ADD 12 OZ DACRON. Step #4: get a quote With all the info you have you can click the link below to return to the Home page and visit our Instant Quote section at the top of the page. Start by clicking the shape then enter sizes as required choose the 12 oz Dacron and stockinette from the drop down. Click the calculate button. You may need to scroll down the page you will see the Reflex 40 Highlighted in red. Now its time to go to the Instant Quote section on the home page choose your required shape. Enter the sizes you need, add Stockinette or Dacron. At the foam shop we offer a range of Industry standard full and half sheets & side sheets as well as our Foam Cut to Size service. If you need information about Foam , Memory foam , Foam Cut to Size, or any of our specialist services including Re-upholstery, Quote Fit and Return service or our Replacement of DFS style cushions. Please Feel free to call one of our sales or customer service team will be pleased to assist you. Why put up with the constant plumping of your Dfs cushion when a simple solution is just one click away. Need Foam Cut to Size? Start using our easy to use ordering software today! ORDER NOW