Q. Which size diary is best?

Answer

The most common size for an ordinary office diary is A5 which is exactly half the size of an A4. A5 size diaries are compact enough to fit any purse laptop bag briefcase or even a sling bag while at the same time being large enough to accommodate all your work plans analyses and lists of appointments. However certain business requirements do call for much larger-sized office diaries like A3 diaries which are primarily used for making charts elaborate plans posters as well as presentations.