A4 Long Book .. You're looking for an A4 long book or notebook. A4 long books or notebooks are great for writing, sketching, or jotting down notes. They're usually 210 x 297 mm (8.27 x 11.69 in) in size, with a longer length than standard A4 paper. You can find A4 long books or notebooks at office supply stores, online marketplaces, or stationery stores. Some popular brands include Moleskine, Leuchtturm1917, and Muji. Would you like me to suggest some online stores or brands that sell A4 long books or notebooks?