Holds stronger and last lasts longer, with 2x the sticking power compared to Post-it? Original Notes. Large size square and lined notes for when details are important. Perfect for vertical or hard to stick surfaces such as computer monitors, doors and walls. Post-it? Notes are made with PEFC certified paper fibres, coming from sustainably managed forests and controlled sources. Made with a 60% renewable resource adhesive from a plant that regrows annually.