Now it's time to size it up. Position your contact paper where you want it and cut accordingly. It's best, if you can, to select contact paper with lines on the back to help you measure accurately. Use your ruler or measuring tape to be as precise as possible. If you have a large surface to cover, you'll have to combine pieces for a smooth finish and overall design, so pay attention to seams and be sure to lay everything out before you start sticking it down.