Since purchasing my first Filofax back in 2009, I've consistently been in personal size, apart from a very brief attempt at using an A5 as my only binder. Whilst personal is a great size for me, the skinny pages aren't so good for when I want to write longer notes, so at some point, I decided to try an A5 for planning projects as well. In theory it made sense, but I tended not to use the A5 as my