Six ring planner inserts are pre-punched pages designed to fit inside a ring-bound binder, available in formats ranging from dated weekly and daily layouts to fully undated and specialty inserts like college or journal pages. The right insert depends on three things: the physical size of your binder, the ring diameter, and the layout that matches how you actually plan. Get all three right and a 6-ring system becomes one of the most flexible planning tools available. Miss one and you end up with pages that gap, sag, or simply never get used.
This guide covers every major insert format, explains what the size numbers actually mean, and helps you figure out which layout fits your life before you spend a dollar.
What sizes do 6 ring planner inserts come in?
Size is the first thing to confirm, because a page that does not match your binder’s ring spacing will not sit flat. The most popular 6-ring format is A5, which measures 148 x 210 mm (roughly 5.83" x 8.27"). It gives you a full page of writing space without the bulk of a letter-size notebook. Below A5 are the Personal size (95 x 171 mm), the A6 (105 x 148 mm), and the compact Pocket format at 81 x 120 mm.
Ring spacing matters just as much as page dimensions. All standard 6-ring systems use three rings per cluster, with each ring 19 mm apart within the cluster. What changes between sizes is the gap between the two clusters: A5 binders use a 70 mm set spacing, Personal binders use 50 mm, and A6 binders use 38 mm. A Personal insert dropped into an A5 binder will not align, even though the holes look similar at a glance.
One common point of confusion: A6 and Personal are not the same size. Personal was first introduced by Filofax in 1930 at 95 x 171 mm, while A6 is a true ISO paper size at 105 x 148 mm. The two formats share a 6-ring punch but have different ring-set spacing, so inserts are not interchangeable.
What insert layouts are available for 6 ring planners?
Once you have the right size, the layout question is where most people spend the most time. The main options are:
Dated weekly inserts print each week with the days and dates already filled in, usually Sunday-to-Saturday or Monday-to-Sunday. They are ready to use the moment they arrive and work well for anyone who plans consistently throughout the year. The trade-off is that a missed week means a wasted spread.
Dated daily inserts give each day its own page, with space for hour-by-hour scheduling, tasks, and notes. They suit people who carry a lot of appointments or like to write at length about each day. The page count is high, which means ring diameter matters more here than with any other format.
Undated weekly and daily inserts leave the date fields blank for you to fill in. You can start any day of the year, skip a slow week without guilt, and pick back up whenever life settles. For anyone whose schedule shifts seasonally or who finds a January start date arbitrary, undated is usually the smarter buy.
Specialty inserts cover everything outside the standard calendar: college-ruled note pages, journal-style prompts, dot-grid pages, and project trackers. These are typically mixed in alongside dated or undated planning pages to build a custom system inside a single binder.
How does ring diameter affect how many inserts fit?
Ring diameter is the spec that most shoppers overlook until their binder is stuffed and the pages no longer close flat. Common ring sizes for A5 6-ring binders are 20 mm, 25 mm, and 30 mm. A 20 mm ring holds roughly 100 to 120 sheets, a 25 mm ring holds around 150 sheets, and a 30 mm ring can accommodate approximately 200 sheets or a full year of weekly inserts plus monthly dividers.
If you plan to run a dated daily insert for a full year, a 30 mm ring is almost certainly what you need. For a lighter setup with a weekly insert and a few note pages, 20 mm is often sufficient and keeps the binder noticeably slimmer in a bag. STIL Classics offers 30mm 6-Ring Binders sized for exactly this kind of full-year build, and their Removable Ring Binders let you swap the ring mechanism without replacing the cover.
Should you choose a dated or undated insert?
Both have genuine strengths, and the honest answer is that it depends on how consistent your planning habit already is. Dated inserts work best when you open your planner every morning without exception. The pre-filled structure adds rhythm and ease when the habit is already solid. If you think in annual arcs or manage a team with fixed deadlines, having the whole year laid out at once has real practical value.
Undated inserts suit a different kind of planner: someone whose schedule changes by season, who plans in focused six-week blocks rather than a full year, or who has tried dated planners and ended up with months of blank pages. The freedom to skip a week and pick up again without any wasted spreads removes a lot of the low-grade guilt that kills planning habits.
A practical middle ground is pairing a dated weekly insert with undated daily or note pages. You keep the calendar structure for appointments while leaving the daily layer flexible enough to skip when you do not need it.
What specialty inserts work well in a 6 ring system?
Beyond the standard weekly and daily formats, a 6-ring binder can hold almost any insert type because the pages are removable and rearrangeable. College-ruled note inserts are useful for students or anyone who takes long-form notes and wants them filed alongside their schedule. Journal inserts with lined or dot-grid pages work for morning writing, evening reflection, or creative brainstorming. Project-tracking inserts, budget pages, and habit trackers are also common additions.
The key advantage of the 6-ring format over a bound planner is that you build only what you need. A student in a heavy semester might load up on College Planner Inserts and note pages, then swap them out during a lighter term. Someone who journals daily might anchor their binder with a Daily Journal Insert and add a thin weekly spread for appointments. The system adapts rather than forcing you to adapt to it.
The Insert Decides the System
The format you choose for your 6-ring inserts is the decision that shapes everything else about how your planner works. Size and ring spacing are fixed constraints you need to match exactly. But the layout, the dated-versus-undated question, and the mix of specialty pages are all genuinely personal calls, and getting them right means the binder actually gets used.
For Canadian shoppers looking for A5 6-ring inserts with clean, minimal layouts, STIL Classics carries a focused range of Planner Inserts in both dated and undated formats, designed to fit standard A5 binders without any guesswork on sizing.
Frequently Asked Questions
Are all 6 ring planner inserts the same size?
No. Six ring inserts come in several sizes, including A5 (148 x 210 mm), Personal (95 x 171 mm), A6 (105 x 148 mm), and Pocket (81 x 120 mm). Each size has a different ring-set spacing, so a Personal insert will not align correctly in an A5 binder even though both use six rings.
What is the difference between a Sunday-start and a Monday-start weekly insert?
A Sunday-start insert opens the week on Sunday and closes on Saturday, which is the North American standard for most printed calendars. A Monday-start insert begins on Monday, which many people prefer for work scheduling since the weekend days sit together at the end of the spread. The layout content is otherwise identical.
Can I mix dated and undated inserts in the same 6 ring binder?
Yes, and many planners do exactly this. A common setup is a dated weekly insert for appointments and a separate undated daily or notes insert for flexible writing. Because 6-ring pages are removable, you can reorder, remove, or add sections at any time without affecting the rest of the binder.
How do I know what ring size my A5 binder uses?
Measure the diameter of one ring from the inside of the ring mechanism, not the outer edge. Common A5 ring diameters are 20 mm, 25 mm, and 30 mm. If you are buying replacement rings or a new ring mechanism, the diameter is almost always listed in the product specs. A 30 mm ring holds roughly 200 sheets, which is enough for a full year of weekly inserts plus monthly dividers and a few note pages.
Do 6 ring planner inserts work with Filofax binders?
Yes. Filofax A5 binders use the standard A5 6-ring punch pattern with a 70 mm ring-set spacing, so any insert labelled as A5 6-ring should fit. The one thing to confirm is ring diameter: older Filofax covers often come with 25 mm rings, so a full daily insert set for a year may require a ring upgrade or a second binder to avoid overcrowding the pages.