Standard Print Size Chart & Guide
Master reference for global printing and layout standards. Get precise dimensions for international ISO A-series (including exact A3, A4, and A5 sizes in inches, cm, and mm), alternative B-series, standard mailing envelopes, and US/North American formats like Letter and Legal—complete with accurate metric-to-imperial conversions and practical, best-use recommendations.Before you print, you can also use our interactive Hardware Diagnostic Tool below to calibrate your printer settings for a 1:1 scale layout.
straightenPaper Size Reference Chart
To further understand these standards, you can read our complete Paper Size Chart & Dimensions Guide below.
ISO A‑Series (International Standard)
The most common paper sizes worldwide. Each size is half the area of the previous one (e.g., A4 is half of A3).
| Format | Size (mm) | Size (inches) | Best Use |
|---|---|---|---|
| A0 | 841 × 1189 | 33.1 × 46.8 | Technical drawings, large posters |
| A1 | 594 × 841 | 23.4 × 33.1 | Flip charts, architectural plans |
| A2 | 420 × 594 | 16.5 × 23.4 | Retail posters, calendars |
| A3 | 297 × 420 | 11.7 × 16.5 | Menus, presentations, small posters |
| A4 | 210 × 297 | 8.3 × 11.7 | Standard documents, letters, magazines |
| A5 | 148 × 210 | 5.8 × 8.3 | Flyers, notepads, invitations |
| A6 | 105 × 148 | 4.1 × 5.8 | Postcards, small flyers, coupons |
US / North American Sizes
Common in the United States, Canada, and parts of Latin America. Based on inches.
| Format | Size (mm) | Size (inches) | Best Use |
|---|---|---|---|
| Letter | 215.9 × 279.4 | 8.5 × 11.0 | Standard office documents |
| Legal | 215.9 × 355.6 | 8.5 × 14.0 | Contracts, legal documents |
| Tabloid | 279.4 × 431.8 | 11.0 × 17.0 | Newspapers, large brochures |
| Executive | 184.1 × 266.7 | 7.25 × 10.5 | Stationery, letterhead |
ISO B‑Series & Envelope Sizes
B‑series sits between A‑series sizes. Envelope sizes are often based on the C‑series or specific designations.
| Format | Size (mm) | Size (inches) | Best Use |
|---|---|---|---|
| B4 | 250 × 353 | 9.8 × 13.9 | Books, magazines |
| B5 | 176 × 250 | 6.9 × 9.8 | Booklets, notebooks |
| C4 Envelope | 229 × 324 | 9.0 × 12.8 | Fits A4 flat |
| C5 Envelope | 162 × 229 | 6.4 × 9.0 | Fits A5 or A4 folded once |
| C6 Envelope | 114 × 162 | 4.5 × 6.4 | Fits A6 or A4 folded twice |
| DL Envelope | 110 × 220 | 4.3 × 8.7 | Fits A4 folded in thirds |
* All measurements are Width × Height. For high‑quality prints, ensure a minimum of 300 DPI.
layers Visual Size Reference Chart (1:√2 Ratio)
Think of it like folding a piece of paper perfectly in half. Every time you fold it, you get the next size down—so if you fold a large A3 sheet in half, you get two standard A4 sheets! This chart visually shows how they all fit together, with the exact width and height in inches clearly marked.
210 × 297 mm
148 × 210 mm
105 × 148 mm
print Interactive Paper Size Test Utility
Don't just trust the numbers on screen—verify your printer setup. Select your paper stock format below to print a precise, 1:1 scale calibration sheet. Use it to verify margins, fix unexpected scaling issues, and double-check layout accuracy.
The Ultimate Paper Size Chart & Dimensions Guide
An absolute reference for designers, printers, and developers. Explore accurate metric-to-imperial conversions and practical use cases for every major layout standard.
Global Layout Standards
Navigating the world of print media can be confusing when dealing with international clients. Choosing the right printer paper size relies entirely on knowing two core systems: the international ISO A-series standard and the North American sizing system.
Whether you are configuring digital layouts in pixels, looking up A3, A4, and A5 size in inches, mm, and cm, or setting up large-scale commercial press runs, matching your medium to its intended real-world purpose ensures your design prints flawlessly without unintended cropping or awkward layout stretching.
The ISO A-Series: From Large-Format Posters to Pocket Flyers
The international paper size chart is built on a clever mathematical aspect ratio of 1:√2. This means that if you cut any sheet in half across its longest side, the resulting smaller sheet retains the exact same spatial proportions.
Large Formats: A0 & A1 Dimensions
The massive a0 format is the foundation of the entire system. When analyzing the dimensions a0 and size values, it measures exactly 84.1 x 118.9 cm (33.1 x 46.8 inches). Because of its huge surface area, it is primarily used for blueprints, technical engineering schematics, and high-impact store-front window advertisements.
If you cut that sheet cleanly in half, you arrive at an A1 layout. If you are wondering what size is a1 or looking up the exact a1 dimensions, it scales down to 59.4 x 84.1 cm (23.4 x 33.1 inches). This scale is highly favored by print shops for event banners, architectural floor plans, and academic exhibition posters.
Standard Media: A3 & A4 Dimensions
Moving down the matrix, the versatile a3 paper size shifts into desktop-publishing territory. It measures 29.7 x 42.0 cm (11.7 x 16.5 inches). Because it offers plenty of visual canvas space while remaining highly portable, businesses use it heavily for restaurant menus, bi-fold corporate brochures, and ledger spreadsheets.
Next is the absolute king of office documentation: the a4 dimensions sheet. Measuring 21.0 x 29.7 cm (8.3 x 11.7 inches), it is the global baseline for international business. From legal contracts and academic essays to magazine publications and daily invoices, this is the default configuration for nearly every commercial printer outside of North America.
Compact Formats: A5 & A6 Dimensions
For smaller marketing materials, an A5 sheet measures 14.8 x 21.0 cm (5.8 x 8.3 inches). It is highly cost-effective and provides a compact layout that fits perfectly into small notebooks, informational flyers, and event programs.
Finally, the pocket-sized format a6 and size parameters wrap up the standard list at 10.5 x 14.8 cm (4.1 x 5.8 inches). This small setup is the universal choice for printing custom postcards, product promotional coupons, and micro-instruction manuals.
North American Formats: Letter vs. Legal
If you are working with clients or print shops located in the United States or Canada, standard ISO metrics are replaced by an entirely separate paper size system based strictly on inches.
The standard document baseline here is the letter size sheet, which measures exactly 8.5 x 11.0 inches (215.9 x 279.4 mm). It serves the same universal office function as international A4 paper, though it is slightly wider and shorter.
When extra space is required for complex clauses or extensive sign-off grids, professionals switch over to the official legal paper size. This format expands vertically to 8.5 x 14.0 inches (215.9 x 355.6 mm). The extended layout is specifically engineered to hold long real estate contracts, court filings, and accounting balance sheets without forcing a break onto a second sheet of paper.
Frequently Asked Questions
What is the exact A3 size in inches?
An standard A3 paper sheet measures exactly11.7 x 16.5 inches. For other common printing units,this is equivalent to 297 x 420 millimeters,29.7 x 42 centimeters,or 3508 x 4960 pixels at a crisp 300 DPI print resolution.
What is the exact A5 size in inches?
A standard A5 sheet measures exactly5.8 x 8.3 inches. In metric units,it is 148 x 210 millimeters or 14.8 x 21 centimeters. It is exactly half the surface area of an A4 sheet,making it a popular option for flyers and note pads.
What is the difference between A4 and Letter?
A4(210×297 mm)is slightly narrower and longer than US Letter(215.9×279.4 mm). A4 is used as the global standard in most countries,while Letter is primarily standard across the US and Canada.
Why are there B‑series paper sizes?
The B‑series provides intermediate geometric sizes between the A‑series increments. For example,a B5 book sits perfectly between an A4 and an A5 layout,giving publishers more comfortable alternative margins.
What envelope size fits an A4 document?
Use a C4 envelope(229×324 mm)to send a flat,unfolded A4 sheet. For a standard business letter fold(an A4 sheet folded horizontally into thirds),use a standard DL envelope(110×220 mm).
What is the exact A4 size in inches and cm?
A standard A4 size in cm measures exactly 21.0 x 29.7 cm. If you are designing for layouts using US metrics, the A4 size in inches is precisely 8.3 x 11.7 inches. For high-resolution printing at 300 DPI, this translates to 2480 x 3508 pixels.
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