A5 Paper Size: Small but Versatile in Print Design

Not all paper sizes are created equal, and A5 paper size proves that point every time someone reaches for a notebook, hands out a flyer, or folds a brochure.

At 148 x 210 mm, A5 sits exactly halfway between A4 and A6 in the ISO 216 standard. It is one of the most practical page formats in print design, used across stationery, marketing materials, publishing, and packaging worldwide.

This guide covers everything: exact dimensions in mm, cm, inches, and pixels, how A5 compares to neighboring sizes, where it gets used, and how to set it up correctly for print.

What is A5 Paper Size

A5 is a standard paper size measuring 148 x 210 mm (5.83 x 8.27 inches). It belongs to the ISO 216 international paper size system and sits exactly halfway between A4 and A6.

The easiest way to think about it: fold a sheet of A4 paper in half along its longest side, and you have two A5 pages. That relationship is baked into the standard itself.

A5 has a printing area of roughly 312 cm2 (48.4 sq inches). Not large, but more than enough for most compact print formats, from personal planners to promotional flyers.

The global stationery market was valued at USD 26.58 billion in 2024 (Market Data Forecast), with paper-based products like A5 notebooks and printed materials driving a substantial share of that demand.

A5 at a glance

Portrait orientation is the default for most A5 documents. Landscape A5 does get used, mostly for greeting cards and specific folded brochure formats.

A5 Dimensions in All Units

Getting the dimensions right before you start a project saves a lot of headaches. Here is every unit you are likely to need.

Physical dimensions

Millimeters: 148 x 210 mm. This is the ISO standard definition.

Centimeters: 14.8 x 21.0 cm. Useful for quick physical reference.

Inches: 5.83 x 8.27 in. Close to, but not the same as, the US Half Letter size (5.5 x 8.5 inches). Worth knowing if you work across both systems.

A5 pixel dimensions by resolution

Pixel size is not fixed. It depends entirely on the resolution you are designing for. Wrong DPI at the start of a project usually means a reformat later.

Adobe confirms 300 DPI as the standard for high-quality A5 print output, including magazines, brochures, and anything that will be read up close. 150 DPI works for flyers and posters where fine detail matters less.

One thing worth flagging: 72 DPI is sometimes listed as the “screen resolution,” but actual screen DPI varies a lot depending on the device. Use it as a rough guideline, not a hard rule.

If you need to convert between units quickly, a PX to MM converter or a PX to Inches tool handles the math without any manual calculation.

Where A5 Fits in the ISO 216 Paper Size System

ISO 216 is the international paper size standard used in almost every country outside North America. It was formalized in 1975, built on the earlier German DIN 476 standard that dates back to the early 20th century.

The whole system works from one rule: each size is exactly half the area of the size above it. Cut an A4 sheet in half and you get two A5 sheets. Cut an A5 in half and you get two A6 pages. This holds across the entire series, from A0 down to A10.

The A-series hierarchy

One key property of the system: all sizes share the same 1:root 2 aspect ratio (approximately 1:1.414). This means scaling between sizes never distorts the layout proportions. A document designed at A5 scales cleanly to A4 or A6 without any recomposition.

The US and Canada use a separate system based on Letter (8.5 x 11 inches), Legal (8.5 x 14 inches), and Ledger/Tabloid. Letter is close to A4 but not identical, so cross-system conversions always need manual adjustment. The closest North American equivalent to A5 is Half Letter at 5.5 x 8.5 inches, though it is slightly wider and shorter.

A5 vs A4 vs A6

These three sizes cover most everyday print and stationery needs. Picking the wrong one is a common mistake, especially in marketing materials where format affects both cost and impact.

Side-by-side comparison

A4 retained 37.33% of 2024 paper notebook revenue because its dimensions match standard copier paper and institutional requirements (Mordor Intelligence, 2024). A5 holds the middle ground, popular for hobby journaling and personal planners where portability matters as much as writing space.

A6 is growing fast. Mordor Intelligence data shows pocket-sized formats (A6 and smaller) are posting a 4.43% CAGR through 2030, driven by commuters and consultants who want something jacket-pocket sized.

For most everyday print projects, A5 is the practical middle point. More content space than A6, lower print cost than A4, and a format that fits most standard bags without folding.

When to choose each size

Pick A4 when the content is dense: reports, detailed brochures, forms, lecture notes. Readers expect A4 for formal documents.

Pick A5 for compact marketing materials, notebooks, booklets, event programs, and anything that needs to be easy to carry or distribute by hand.

Pick A6 when maximum portability matters more than content space: postcards, reminder cards, small promotional inserts.

Common Uses for A5 Paper

A5 covers a lot of ground. Its dimensions sit at a useful midpoint, enough space for real content, small enough to be genuinely portable.

Adobe notes A5 is among the most popular formats in advertising and communications, widely used for promotional leaflets, brochures, booklets, and notepads. The paper notebooks market was valued at USD 4.14 billion in 2024 and is projected to reach USD 5.78 billion by 2033 (Market Reports World), with A5 being a leading format in the hobby journaling and personal planner segment.

Print and marketing

A5 is one of the two most common flyer formats globally, alongside A6. Large enough to include both imagery and copy. Small enough to hand out at events or slip into a bag without any hesitation.

• Promotional flyers and leaflets
• Folded brochures (A4 sheet folded once = A5 brochure)
• Event programs and schedules
• Restaurant menus
• Direct mail inserts

Producing two A5 flyers from a single A4 press sheet is standard practice in print design. It keeps unit costs down, which matters when you are printing thousands of copies.

Notebooks, planners, and journals

The A5 notebook format is arguably what most people picture when they think about the size. Brands like Leuchtturm1917, Moleskine, and Filofax have all built product lines around it. In May 2024, Leuchtturm1917 secured EUR 15 million in private equity investment specifically to support global expansion of its A5-centered product range (Technavio).

A5 planners and bullet journals have been consistently popular for the last several years. The format is wide enough for daily scheduling layouts and narrow enough to fit most handbags.

Books, publications, and cards

Smaller paperback books and pocket guides regularly use A5. Greeting cards and formal invitations are also a natural fit. The C5 envelope (229 x 162 mm) holds an A5 sheet flat, making it straightforward to pair with standard mailing supplies.

A5 in Digital Design and Print Setup

Setting up an A5 document correctly at the start of a project is one of those things that seems obvious until you get it wrong. Bleed, margins, color mode, and resolution all need to be configured before you start designing, not after.

Document setup in design software

Adobe InDesign: New document, set width to 148 mm and height to 210 mm. Add 3 mm bleed on all sides (the print industry standard for ISO paper sizes). Set color mode to CMYK for print output.

Adobe Illustrator: Same dimensions and bleed settings. Worth reading up on how to set up bleed in Illustrator if you have not done it before. Getting that 3 mm bleed wrong is one of the most common reasons print files get rejected by commercial printers.

Adobe Photoshop: New document, 1748 x 2480 px at 300 PPI for print. Use CMYK color mode from the start. Converting RGB to CMYK after the fact often shifts colors noticeably, especially saturated reds and blues.

Microsoft Word and Google Docs: Go to Page Setup or Page Size and select A5. Both applications support it natively. Margins default to something generous, so adjust them manually if you want to maximize the usable area.

A5 pixel dimensions for print

For any print work, 300 PPI is the minimum. Pixartprinting confirms this is the standard for A5 flyers, brochures, and booklets. At 300 PPI, A5 is 1748 x 2480 pixels.

• 72 PPI (420 x 595 px): Screen display only
• 150 PPI (874 x 1240 px): Draft prints, newspapers
• 300 PPI (1748 x 2480 px): Commercial print standard

If you are working on an A5 booklet, design the spread at A4 size (2480 x 3508 px at 300 PPI), with two A5 pages sitting side by side. This makes imposition straightforward when you send the file to a printer.

Color mode matters just as much as resolution. Use RGB for anything going on screen. Switch to CMYK for anything going to a commercial printer. Using a RGB to CMYK converter helps check how colors will shift before you send files to print.

For A5 PDFs, export at press-quality settings with crop marks enabled. Always include the 3 mm bleed in the export. Most print services will reject files that are missing it, and rightly so. If you want a full checklist, the guide on how to set up a print-ready file covers everything you need before submitting.

Printing A5 on Standard Printers

Most home and office printers handle A5 directly. Load the paper, change the page size in your print dialog, and you are done. The tricky part is duplex (double-sided) printing on A5, which a lot of consumer printers do not support automatically on smaller sheet sizes.

The most reliable workaround: design your document at A4 size with two A5 pages side by side, print duplex on A4, then cut the sheets in half. Two A5 pages per A4 sheet. Clean output, no paper feed issues.

Direct A5 printing

Step 1: Load A5 paper into the manual feed tray, not the main cassette. Slide the guides snug against both edges of the stack.

Step 2: In your print dialog, set both the document size and the paper size to A5. Mismatching these is the most common reason A5 prints come out scaled incorrectly.

Step 3: Always run a single test sheet before printing a batch, especially for double-sided work. Duplex alignment on A5 paper varies between printer models.

Printing A5 booklets from A4 sheets

Two A5 pages impose cleanly on one A4 sheet. This is the standard method for producing A5 booklets at home or through commercial print services.

• Design at A5 page size in InDesign or Illustrator
• Export as PDF, then use the booklet print option in Acrobat Pro
• Set paper size to A4 landscape in print settings
• Fold and saddle-stitch the printed sheets

Adobe InDesign’s built-in booklet print feature is less reliable than going through Acrobat Pro for the imposition step. Most print professionals export to PDF first, then use Acrobat’s booklet printing. Worth knowing before you waste a stack of paper troubleshooting InDesign’s output.

For print services, sending a correctly imposed PDF with bleed and crop marks is standard practice. Most commercial printers accept PDF/X-1a or PDF/X-4 formats. Check their file specs before sending, as requirements vary.

Common printing errors

Scaled output: Document size and printer paper size are set differently. Set both to A5 explicitly.

Skewed print: Paper guides are loose in the tray. Slide them firmly against the paper stack before printing.

Duplex misalignment: Flip direction varies by printer. Run a 4-page test before printing a full run. Mark the paper after the first pass so you know which way to reload it.

A5 Envelopes and Folding Standards

Pairing an A5 document with the wrong envelope is a surprisingly common mistake in direct mail campaigns. The C-series envelope system is designed specifically to work with A-series paper, so the matching is straightforward once you know the rules.

Irregular envelope dimensions can push postage costs up significantly. Tycoon Packaging notes that non-standard sizes can increase postage by up to 50% compared to standard formats, which matters a lot on large mail runs.

Which envelope fits A5

The C5 envelope is the cleanest option for A5 documents. It holds the sheet flat, no folding required, which matters for brochures and anything with heavy ink coverage where a crease would be visible.

DL is the most common business envelope format globally and works well for A5 documents that can tolerate a fold. Most business correspondence and direct mail inserts use DL because it slots into standard mailing systems without issue.

Folding methods for A5

Half fold (for C6): Fold the A5 sheet once along its longest axis. Finished size is roughly A6, which fits a C6 envelope flat.

Tri-fold (for DL): Fold the sheet into thirds. Works best when the document is designed for tri-fold from the start, with content panels sized to match the fold positions.

For direct mail, the safe zone becomes especially relevant around fold lines. Keep important content and any text at least 5 mm away from planned fold positions to avoid anything sitting awkwardly in a crease.

A5 Paper Weight and Stock Options

Paper weight affects how a printed piece feels in hand and how well it survives handling, posting, and repeated use. GSM (grams per square meter) is the standard measure. Higher GSM means heavier, thicker paper.

The right weight depends entirely on what you are printing. A daily-use notepad needs something different from a premium A5 brochure or a product catalog cover.

GSM ranges and their uses

Standard office printer paper runs at 80-90 gsm (Solopress). That weight works fine for notebooks and internal print jobs. Step up to 100-120 gsm for anything customer-facing, where the physical feel contributes to how the piece is perceived.

Coated vs uncoated stock

Coated paper has a surface treatment (gloss, silk, or matte) that makes colors appear richer and sharper. Uncoated stock absorbs ink more, giving a softer, more tactile result that is easier to write on.

• Gloss: High sheen, vivid color. Best for image-heavy A5 flyers and product brochures
• Silk / satin: Mid-sheen, still writable. The go-to for most commercial A5 brochures
• Matte: No sheen, premium feel. Works well for A5 notebooks and editorial-style booklets
• Uncoated: Best for any A5 format that will be written on, like planners and journals

Leuchtturm1917’s A5 notebooks use an 80 gsm uncoated paper specifically chosen for fountain pen and marker compatibility, a real consideration for the journaling market where ink bleed-through is a common complaint.

Paper finishes and specialty stocks

Beyond standard coated and uncoated options, A5 print design can use specialty treatments to add tactile or visual impact.

Recycled stock: 42% of students and professionals now prefer recycled paper notebooks, according to Market Reports World 2024. The demand has pushed most major paper suppliers to offer recycled options at most GSM weights without significant quality loss.

Textured stocks (linen, felt, laid) are available from most commercial suppliers and work well for A5 invitations and premium stationery. They cost more per sheet but the physical difference is immediately noticeable. For any project where paper type affects brand perception, it is worth ordering samples before committing to a full print run.

Understanding paper weight versus thickness is also worth doing before placing a large order. Two papers at the same GSM can have different thickness values depending on their density and coating, which affects how they feel and how they feed through a press.

FAQ on A5 Paper Size

What are the dimensions of A5 paper?

A5 measures 148 x 210 mm (14.8 x 21.0 cm, or 5.83 x 8.27 inches). It is part of the ISO 216 international paper size standard and exactly half the area of an A4 sheet.

What is A5 paper size in pixels?

It depends on resolution. At 300 DPI for print, A5 is 1748 x 2480 pixels. At 150 DPI it is 874 x 1240 px. At 72 DPI for screen use, it is 420 x 595 pixels.

Is A5 the same as half of A4?

Yes. Fold an A4 sheet in half along its longest side and you get two A5 pages. This relationship is built into the ISO 216 standard, where each size is exactly half the area of the one above it.

What is A5 paper used for?

A5 is common for notebooks, planners, flyers, brochures, booklets, and greeting cards. Brands like Leuchtturm1917, Moleskine, and Filofax use it as their core notebook format. It is also widely used for promotional leaflets and direct mail inserts.

What envelope fits an A5 sheet?

A C5 envelope (162 x 229 mm) holds an A5 sheet flat. A C6 envelope fits an A5 sheet folded in half. A DL envelope fits an A5 sheet folded into thirds, making it a standard choice for business mail.

What is the difference between A5 and A4?

A4 is 210 x 297 mm, exactly twice the area of A5. A4 suits detailed documents, reports, and formal correspondence. A5 is better for compact formats where portability and lower print cost matter more than content space.

What DPI should I use for A5 print?

300 DPI is the standard for commercial A5 print output, including brochures, booklets, and magazines. Use 150 DPI for draft prints or newspaper-quality flyers. 72 DPI is for screen display only and will produce blurry results if sent to print.

What paper weight should I use for A5 printing?

Use 80-90 gsm for everyday documents and notebooks. Step up to 100-120 gsm for flyers and quality letterheads. For brochures and leaflets, 130-170 gsm is standard. Card stock for covers and invitations typically runs at 250-350 gsm.

How do I set up an A5 document for print in Adobe software?

In InDesign or Illustrator, set the document size to 148 x 210 mm. Add 3 mm bleed on all sides. Set the color mode to CMYK before you start designing. Export as a press-quality PDF with crop marks and bleed included.

Is A5 a standard size in North America?

No. The US and Canada use their own system based on Letter (8.5 x 11 inches) and Legal sizes. The closest North American equivalent to A5 is Half Letter at 5.5 x 8.5 inches, though it is slightly wider and shorter than A5.

Conclusion

This conclusion is for an article presenting A5 paper size as one of the most versatile page formats in the ISO 216 standard, covering everything from exact measurements to real-world print setup.

Whether you are choosing between gsm weights for a brochure, matching a C5 envelope to a direct mail insert, or configuring pixel dimensions at 300 DPI for commercial output, the decisions are straightforward once you understand the format.

A5 sits at a practical midpoint. More portable than A4, more usable than A6.

From Moleskine notebooks to promotional leaflets, the document format has proven itself across print design, stationery, and publishing for good reason.

Get the page dimensions, bleed, and color mode right from the start, and the rest follows.

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Bogdan Sandu

Bogdan Sandu is a seasoned designer who has been designing websites since 2008.

Renowned for his expertise in logo design and visual branding, Bogdan has developed a multitude of logos for various clients.

His skills extend to creating posters, vector illustrations, business cards, and brochures. Additionally, Bogdan's UI kits were featured on marketplaces like Visual Hierarchy and UI8.

He also wrote in the past years on sites like Design Your Way, WebDesignerDepot, WPDean, Designmodo, Speckyboy, Slider Revolution, and more.

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