Filofax Organisers Filofax measure their organisers based on the size of refill used, therefore the actual organiser size may vary slightly between styles (and zipped versions will always be slightly larger)
The size and style will usually be embossed on the inside left-side of the organiser, i.e.
Where 'Metropol' is the style and 'Pocket' is the size.
For Diary Refills, the last two digits refer to the year.
Where 'Personal' is the size, and '6842112' is the refill code, and the same refill for 2013 will be 6842113.
Mini Organisers - use Mini Refills 67mm x 105mm, with 5 holes
Pocket Organisers - use Pocket Refills 81mm x 120mm with 6 holes
Personal Organisers - use Personal Refills 95mm x 171mm with 6 holes
Slim Organisers - use Personal Refills 95mm x 171mm with 6 holes
Compact Organisers - use Personal Refills 95mm x 171mm with 6 holes
A5 Organisers - use A5 Refills 148mm x 210mm with 6 holes
A4 Organisers - use A4 Refills 210mm x 297mm with 4 holes