A loose-leaf planner or notebook only fits your binder when the paper size and the number of holes match. Here is a quick chart of the common sizes.
Japanese loose-leaf sizes and holes (quick chart)
| Size | Paper size | Common hole count | Hole spacing |
|---|---|---|---|
| A4 | 210 × 297 mm | 30 holes | 9.5 mm |
| B5 (JIS) | 182 × 257 mm | 26 holes | 9.5 mm |
| A5 | 148 × 210 mm | 20 holes (some products use 22) | 9.5 mm |
| B6 | 128 × 182 mm | Varies by product (Timekeeper Deco uses 21 holes, our own standard) | Timekeeper Deco: 8.47 mm |
| Mini (L size) | 86 × 128 mm | 9 holes | 9.5 mm |
A4, B5, A5 and Mini share the same 9.5 mm hole spacing, so the hole positions line up. B6 hole counts differ between products, so count the rings on your binder first.
JIS B5 and ISO B5 are different
Japanese B5 (JIS) is 182 × 257 mm. ISO B5, used in most other countries, is 176 × 250 mm. "B5 26-hole" loose-leaf in Japan means JIS B5.
Planner sizes from around the world (hole count)
- Bible size: 6 holes
- Mini 6: 6 holes
- M5: 5 holes
- US Letter: 3 holes (4.25-inch ring spacing)
Timekeeper Deco can also make pages in these sizes for you to print at home. Set the paper size in your printer settings, and punch the holes yourself.
FAQ
Q. How many holes does B5 loose-leaf have?
A. Japanese B5 (JIS, 182 × 257 mm) usually has 26 holes, 9.5 mm apart.
Q. Is A5 20-hole?
A. Most A5 loose-leaf has 20 holes, but some products use 22. Count the rings on your binder.
Q. How many holes does A4 have?
A. Usually 30 holes, 9.5 mm apart.
Q. What size is Mini (L size), and how many holes?
A. 86 × 128 mm with 9 holes.
Q. Is ISO B5 the same as Japanese B5?
A. No. Japanese B5 is 182 × 257 mm; ISO B5 is 176 × 250 mm.
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* As of November 1, 2026. The site keeps improving, so what you see on screen may differ from this description.