The size of the inserts you should purchase for your Filofax depends on the specific model and size of your organizer. Filofax offers a variety of sizes, including Personal, A5, Pocket, and Mini, among others. For instance, if you have a Personal-sized Filofax, the inserts will typically measure 3.75 inches by 6.75 inches. If your organizer is A5-sized, the inserts will generally be 5.8 inches by 8.3 inches. Pocket-sized planners will require inserts that measure 3.15 inches by 4.7 inches. It is essential to verify the size of your particular Filofax model in order to select the appropriate inserts.
You can usually find information regarding specific insert sizes on the product pages of Filofaxusa.com. While you can choose from pre-printed pages, you may also consider blank or lined pages for more customization. Each size also comes with various designs and layouts, so you may want to explore those options as well to cater to your particular planning style.