I don’t know about you but I love a new start. For me, planners are a way to commit to a change, make new promises to myself and set new goals. I know when I started years ago really getting into planners I was confused by the different sizes and I wasn’t really sure what I would need to fit my lifestyle. There are days when I work from home and want to just keep my planner on my desk so it’s easily accessible, I make notes and can always check the schedule and time where I need to keep something in my bag for making sure I don’t double book myself when making appointments or arranging different activities.

planner size binders and inserts

In my Etsy shop, I make planner inserts in 2 different sizes. Personal and A5. If you aren’t a planner obsessed like me this can sometimes be confusing because both these sizes can fit a Filofax, and a Kikki K yet they are so different because these planners come in multiple sizes.

In this post, I will give you a summary of which planners are which sizes. I will focus on my favourite type of planners, ring bound planners. Because of their diversity, durability and how customisable these planners can be, in my opinion, they are perfect if you need more than just a dated planner.

With ring bound planners you have the flexibility to add/remove pages and to choose inserts that are specific to your needs as well as chose a real leather cover or a faux to suit more your budget. Another good thing is that they come in multiple sizes.

When I was choosing my planner I had in mind two things to consider:

  • how portable I need this planner to be
  • how much space I need to write in

In a nutshell, there are six most common ring round planners sizes out there

A4 & Letter size

A4 (8.27 × 11.69 in) such as Filofax Finsbury

Letter size (8.5×11″) such as Frank convey monarch


A5 is the size that I personally use and love most (5.8 x 8.3 in)

Planners that use A5 inserts:

Personal size

Ideal for carrying it around with you these inserts are 3.75″ x 6.75


4.72 x 3.18 mm

Once you figured out which planner suits you best it’s time to look for inserts.

Check out below my Etsy shop for:


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