How to Order Measure the room in meters and insert the width and length in the corresponding fields. Click the Calculate Price button and then click on Add to Basket. Note: The quotation you receive includes the number of packs calculated to fit the total surface you entered plus an extra 5% to compensate for any losses in the trimming process. You can easily change this automatic setting in the Basket page by changing the number of packs and then clicking on the "Update" button. In the case of different shaped rooms you might need to take into account every shape like alcoves and small adjacent rooms or just update the number of packages in the Basket page.