An A4 sheet of lined paper measures exactly 210 × 297 mm (8.27 × 11.69 inches), and its line spacing comes in three standard rulings: 7.1 mm (College Ruled), 8.7 mm (Wide Ruled), or 6.35 mm (Narrow Ruled).
If you’ve ever printed a lined template and watched it get cut off at the edges, or loaded A4 into a US Letter binder and felt the difference, you already know: one millimeter changes everything. A4 is the international standard for notebooks, planners, and office paper across more than 160 countries. But the US uses Letter (8.5 × 11 inches), and the two are close enough to cause real alignment headaches — from misprinted notes to binders that won’t close. This article covers the exact dimensions, the three line spacing options, and exactly how to print a lined A4 template without the usual scaling traps.
A4 Lined Paper Dimensions: The Exact Numbers
A4 lined paper follows the same base dimensions as every A4 sheet, set by the ISO 216 standard. Those dimensions are 210 millimeters wide by 297 millimeters tall. In inches, that’s 8.27 by 11.69 inches — 0.69 inches taller than US Letter and 0.05 inches narrower.
The aspect ratio is 1:√2 (roughly 1.4142), which means if you fold or scale it in half, the proportions stay the same. That’s why A5 fits neatly inside an A4 binder and A3 is exactly two A4 sheets side by side.
Here’s how A4 compares in pixels at common resolutions:
| Resolution | Width (px) | Height (px) |
|---|---|---|
| 300 DPI (print standard) | 2,480 | 3,508 |
| 72 DPI (screen) | 595 | 842 |
| 200 DPI (draft print) | 1,654 | 2,339 |
| 150 DPI (web preview) | 1,240 | 1,757 |
| 96 DPI (standard screen) | 794 | 1,123 |
| Surface area | 0.0625 m² (96.87 sq in) | |
| Tolerance | ±2.0 mm (for dimensions in this range) | |
What Are The Three A4 Lined Paper Rulings?
The main difference between lined types isn’t the paper size — it’s the spacing between the lines. The three standard rulings are College Ruled, Wide Ruled, and Narrow Ruled, each designed for different handwriting sizes.
College Ruled (7.1 mm spacing)
This is the most common ruling for A4 notebooks and filler paper. The 7.1 mm gap fits average adult handwriting and gives about 39 lines per page. It’s the default for most A4 ruled pads sold outside North America. A4 College Ruled is actually very similar to US College Ruled, which is roughly 7.1 mm as well.
Wide Ruled (8.7 mm spacing)
Wide Ruled leaves 8.7 mm per line, roughly 32 lines per page. It’s better for larger handwriting, younger students, or anyone who prefers more breathing room between lines. A4 Wide Ruled is a real spec — 8.7 mm — and it’s not the same as US Wide Ruled, which is 12.7 mm. If you import A4 notebooks, check the ruling spec before buying.
Narrow Ruled (6.35 mm spacing)
Narrow Ruled packs about 44 lines on each A4 sheet. The 6.35 mm spacing suits small, tight handwriting and is common in professional notebooks and bullet journals. It’s also called “line spacing” or “account ruled” in some stationery catalogs.
How A4 Lined Paper Differs From US Letter
The biggest practical trap is assuming A4 and US Letter are interchangeable. They’re not. US Letter is 8.5 × 11 inches — wider by 5.8 mm and shorter by 17.5 mm. That extra height on A4 means a lined template designed for A4 will be cropped if printed on Letter paper, and a US Letter template will leave a blank strip at the top or bottom when printed on A4.
Binders are another mismatch. A4 ring binders are sized for 210 × 297 mm paper. If you put US Letter paper into an A4 binder, it rattles side-to-side. If you put A4 paper into a US Letter binder, it sticks out the top by nearly three-quarters of an inch. If you’re buying notebooks or loose paper online, check our roundup of the best A4 lined paper options to avoid the wrong ruling or size.
The paper weight matters too. Standard office A4 starts at 80 GSM, which works for everyday notes but bleeds with fountain pens. The best A4 lined notebooks for serious writing run 90–100 GSM.
Printing A4 Lined Templates Without The Scaling Trap
Lined PDF templates from Inks and Pens are free and ready to print. The one setting that causes 90% of failures is scaling. Here’s the correct step order:
- Open the PDF and select Print.
- Under Page Sizing & Handling, choose Actual Size or set scaling to 100%.
- Never select “Fit” or “Scale to Fit Paper” — that shrinks or stretches the layout and breaks the margin alignment.
- If the template doesn’t include a border, add a 0.3 inch margin in your PDF editor before printing to avoid the printer’s non-printable area.
- For double-sided printing: print page 1, flip the sheet face-up, and print page 2. If your printer supports auto-duplex, the template will handle the reverse alignment.
TerraSlate also sells waterproof synthetic A4 paper (210 × 297 mm) that works in standard inkjet and laser printers, useful for outdoor notes or kitchen reference sheets.
Common Mistakes With A4 Lined Paper
| Mistake | What Actually Happens |
|---|---|
| Assuming A4 = US Letter | A4 is taller and narrower; documents get cropped or misaligned |
| Printing at “Scale to Fit” | Lined templates shrink or stretch, ruining the margin layout |
| Using 80 GSM for fountain pens | Ink bleeds through; switch to 90 GSM or higher |
| Confusing A4 wide ruled (8.7 mm) with US wide ruled (12.7 mm) | Lines appear far too tight or too loose for the notebook |
| Buying US Letter binders for A4 paper | Paper sticks out 0.69 inches at the top |
Checklist: Getting A4 Lined Paper Right
- Verify the sheet is 210 × 297 mm — not 8.5 × 11 inches.
- Choose your ruling: 7.1 mm for standard writing, 8.7 mm for larger handwriting, 6.35 mm for dense notes.
- Check GSM before buying: 80 GSM for light use, 90+ GSM for pens or durability.
- When printing a template, set scaling to 100% and add a border if needed.
- Match your binder to your paper — A4 paper in an A4 binder, Letter paper in a Letter binder.
FAQs
Can I use A4 lined paper in a US Letter binder?
A4 paper is roughly 0.69 inches taller than US Letter, so it will stick out the top of a US Letter binder. Most binders also have rings centered for the 8.5-inch width, which means A4 paper may also shift side-to-side. Stick with an A4 binder for A4 paper.
What is the difference between college ruled and wide ruled in A4?
College Ruled has 7.1 mm spacing (about 39 lines per page), while Wide Ruled uses 8.7 mm spacing (about 32 lines per page). College Ruled is the standard for adult handwriting; Wide Ruled works better for larger handwriting or younger students.
What GSM weight should I choose for A4 lined paper?
Standard office A4 lined paper uses 80 GSM. For fountain pens, markers, or long-term storage, choose 90–100 GSM. Heavier paper resists bleed-through and feels crisper, but it’s slightly thicker and may not fit all binders with tight ring capacities.
Why does my printed A4 lined template look cut off?
The most common cause is the “Scale to Fit” setting in your printer dialog, which shrinks the page to avoid the printer’s non-printable border. Set scaling to 100% or “Actual Size” instead. If the built-in margin is too small, add a 0.3 inch border in your PDF editor.
Is A4 the same as legal paper?
No. Legal paper is 8.5 × 14 inches (216 × 356 mm). A4 is shorter by roughly 2.2 inches and narrower by 0.2 inches. Legal and A4 are not interchangeable in binders, printers, or document settings.
References & Sources
- Inks and Pens. “Free Ruled Paper Templates.” Original source for the three standard A4 line spacings and print step instructions.
- Automated Business Machines. “A4 Size Writing Paper.” Details on ISO 216 dimensions, GSM weights, and the A-series halving principle.
- Papersizes.io. “A4 Paper Size in Inches, mm, cm, and Pixels.” Pixel dimensions at 300 and 72 DPI, confirmed via metric-to-pixel calculation.
- Quill.com. “A4 Paper Size Dimensions & Usage.” US Letter vs. A4 comparison and common scaling pitfalls.
- Wikipedia. “International Standard Paper Sizes.” ISO 216 history, tolerance specs, and A-series derivation.