The 5.7" x 8.5" FUNCTION Erasable Notebook is a smart notebook featuring special erasable, reusable paper when used with erasable gel pen (6003-21). Scan and share notes via text message and email with apps like Adobe Scan or Camscanner. Wipe pages clean with a damp towel and reuse over and over again. Features 15 white lined paper sheets, 15 dotted line sheets and undated weekly calendar page.