These rolls of adhesive have a grid printed on the reverse backing paper so that you can control and manage the length of the sticker. They are an economic solution to fixing and supporting the oxygen tube on the face. The first roll worked really well so I have bought two more rolls. Delivery was fine and I shall use 'dontas' again. I use the patches as oblong shapes but it would be easy to cut as circles or ovals. Nice product, very good seller.