Few things are as frustrating as printing a design only to find it doesn’t fit the paper you bought. If you’re working with A2, this guide gives you the precise dimensions (16.54 by 23.39 inches), compares A2 to other A-series sizes, and explains what those numbers mean for your next project.
A2 width in inches: 16.54 in ·
A2 height in inches: 23.39 in ·
A2 area in square inches: 386.6 sq in ·
A2 aspect ratio: 1:1.414 (ISO 216)
Quick snapshot
- A2 paper size is defined by ISO 216 (Papersizes.org (ISO paper size reference))
- A2 dimensions: 16.54 × 23.39 inches (Rensselaer Polytechnic Institute IT Service (educational institution))
- A2 area: 386.6 square inches (Papersizes.org (ISO paper size reference))
- Rounding differences exist — some sources give 16.5 × 23.4 in (Neenah Paper (paper manufacturer)), while others use 16.54 × 23.39 in
- Exact pixel dimensions depend on DPI and aspect ratio constraints (A2-size.com (paper size resource))
- Conversion from metric to imperial introduces small rounding variations that can affect frame fitting (Adobe (design software company))
- A2 is the third-largest A-series size after A0 and A1 (PapersizesWiki (paper size reference))
- A2 is exactly half the size of A1 and twice the size of A3 (PapersizesWiki (paper size reference))
- A2 is widely used for posters, banners, and architectural drawings
- At 300 DPI, A2 requires 4961 × 7016 pixels — essential prep for high-quality prints
Eight key facts about A2 paper — one pattern: every value traces back to the ISO 216 standard, where A2 is derived by halving A1 and rounding to the nearest millimetre.
| Label | Value |
|---|---|
| ISO 216 standard | Yes (A-series) |
| Width in inches (exact) | 16.5354 in |
| Height in inches (exact) | 23.3858 in |
| Width in cm | 42.0 cm |
| Height in cm | 59.4 cm |
| Area in sq in | 386.6 sq in |
| Area in sq cm | 2494.8 sq cm |
| Aspect ratio | 1:√2 |
What is A2 size in inches?
Exact A2 dimensions in inches
- Width: 16.54 inches (420 mm) — based on the ISO 216 standard
- Height: 23.39 inches (594 mm) — matches the metric original exactly
- Area: 386.6 square inches — about 2.68 square feet
Professional printers work in millimetres; the inch values are conversions. Ordering A2 prints from an online service? Always double-check whether the shop uses ISO metric dimensions or US inch‑based sizes. A mismatch of even 0.5 in can shift your artwork outside the printable area.
The implication: always confirm the standard before committing to a print run, as rounding differences between sources can introduce fit issues.
Why A2 is 16.54 × 23.39 inches
The A‑series is built on a simple principle: each size is half the area of the previous one, with a constant aspect ratio of 1:√2 ≈ 1.4142. A0 has exactly 1 m² of area. Halve it once and you get A1 (594 × 841 mm). Halve it again and you get A2 (420 × 594 mm). The inch equivalents 16.54 and 23.39 are the result of converting those metric dimensions at 1 inch = 25.4 mm, then rounding to two decimal places.
Neenah Paper lists A2 as 16‑1/2 × 23‑3/8 inches — a fractional rounding that’s still within the same printable area. For precision work (like architectural drawings or fine art prints), use the decimal version.
What is A2 size in cm?
A2 in centimeters: 42.0 × 59.4 cm
- The ISO 216 standard defines A2 as 42.0 cm by 59.4 cm
- This is the native metric dimension — no rounding, no conversion error
Converting A2 cm to inches
To convert centimetres to inches, divide by 2.54. 42.0 cm ÷ 2.54 = 16.54 in; 59.4 cm ÷ 2.54 = 23.39 in. The formula is exact — the inch version is simply the metric size written in imperial units.
What is A2 size in feet?
A2 dimensions in feet
- Width: approximately 1.378 feet (16.54 in ÷ 12)
- Height: approximately 1.949 feet (23.39 in ÷ 12)
- Area: about 2.68 square feet
Practical use in construction and framing
Contractors and framers often think in feet and inches. An A2 print that’s 1 ft 4½ in wide by 1 ft 11⅜ in high fits into standard poster frames sold as “A2” — but never assume the frame’s internal rabbet matches the paper exactly. Always measure the paper first.
A “23 × 16 inch” frame sold in US hardware stores is not A2 — those numbers are inches but not the same as ISO dimensions. True A2 frames hold 23.39 × 16.54 in paper. A 23×16 frame will leave a gap or require trimming.
What this means: always verify the frame’s internal dimensions against the paper, never rely on labels alone.
How does A2 compare to other A‑series paper sizes in inches?
A1 vs A2 size in inches
- A1: 23.39 × 33.11 inches — twice the area of A2
- A2: 16.54 × 23.39 inches — exactly half the height of A1, same width as A1’s short side
A2 vs A3 size in inches
- A3: 11.69 × 16.54 inches — half the area of A2
- Two A3 sheets placed side by side make one A2 (same orientation)
A2 vs A4 size in inches
- A4: 8.27 × 11.69 inches — quarter the area of A2
- Four A4 sheets tile perfectly to cover an A2 sheet
Four sizes, one pattern: each step halves the area while preserving the 1:√2 ratio.
| Size | Width (in) | Height (in) | Width (cm) | Height (cm) | Area (sq in) |
|---|---|---|---|---|---|
| A1 | 23.39 | 33.11 | 59.4 | 84.1 | 774.4 |
| A2 | 16.54 | 23.39 | 42.0 | 59.4 | 386.6 |
| A3 | 11.69 | 16.54 | 29.7 | 42.0 | 193.3 |
| A4 | 8.27 | 11.69 | 21.0 | 29.7 | 96.7 |
The pattern: the halving progression means A2 sits squarely in the middle of professional print sizes — large enough to command attention, small enough to mail or carry easily.
What is A2 size in pixels?
Recommended pixel dimensions for A2 at 300 DPI
- 300 DPI (print quality): 4961 × 7016 pixels
- 150 DPI (large format): 2480 × 3508 pixels
- 72 DPI (screen): 1191 × 1684 pixels
A2 in pixels for screen and print
At 300 DPI, a single A2 image needs about 34.8 megapixels. For comparison, that’s roughly the resolution of a high‑end DSLR camera. For web use, 72 DPI drops to 2 megapixels — more than enough for a website preview.
A 300‑DPI file at A2 is large — around 30‑50 MB uncompressed. Designers exporting for print should use a lossless format (TIFF or PNG) and check the image resolution stays above 200 DPI for sharp output on offset presses.
The implication: balance file size against output quality — at A2 scale, 200 DPI is the minimum threshold for acceptable press results.
What is A2 paper size in inches used for?
Common uses of A2 paper
- Posters and signage — A2 is large enough to read from 10–15 ft away
- Architectural drawings and blueprints — standard in UK and European practices
- Art prints and portfolios — many fine‑art editions are printed on A2
Just as a size guide helps you choose the right tote bag, knowing A2 dimensions ensures your poster fits the frame without trimming or white borders. If you’re sending A2 artwork to a printer, always confirm they support ISO A‑series — many US print‑on‑demand shops default to US letter and tabloid sizes.
A2 for posters and art prints
A2 posters are a sweet spot: big enough to create a visual statement, small enough to frame affordably. A standard A2 poster in a 24×36 inch frame? It won’t fill the frame — the 16.54×23.39 in paper leaves a 4‑inch border on the long side. Order an A2‑specific frame instead.
A2 in design and architecture
Architects and interior designers use A2 for presentation boards, elevations, and floor plans. The size gives enough room for detailed annotations while remaining manageable on a desk. One tip: when writing a check for a framing deposit, note the A2 dimensions so the framer doesn’t mistake it for a US‑derived size.
Confirmed facts
- A2 paper size in inches is 16.54 × 23.39 (based on ISO 216)
- A2 is half the size of A1 and twice the size of A3
- The area of A2 is 386.6 sq in
What’s unclear
- Rounding conventions vary between sources (fractional vs decimal inch notation)
- Exact pixel dimensions depend on the chosen DPI and output medium
- Compatibility with non‑ISO frames (e.g., US custom sizes) requires manual verification
“A2 paper is commonly used for posters and fine art prints because it offers a large canvas without the awkward handling of A1.”
— Adobe (design software company), design resource on paper formats
“ISO A2 dimensions are 420 × 594 mm — the inch values are approximate conversions that some sources round differently.”
— Papersizes.io (paper size reference service)
The upshot: A2 gives designers and printers a predictable, standardised surface that bridges the gap between portable A3 and presentation‑scale A1. For the UK market — where architectural practice relies on ISO A‑series — A2 is the default “medium format” for project submissions and client presentations.
For anyone ordering prints or choosing frames, the implication is clear: always specify the standard (ISO A2, 16.54 × 23.39 in) and verify that your supplier works in metric millimetres, not rounded inches. A few seconds of double‑checking now saves the cost of reprinting later.
For a comprehensive reference on A2 paper sizing, the A2 paper dimensions guide provides exact dimensions and useful comparisons.
Frequently asked questions
Is A2 bigger than A3?
Yes. A2 (16.54 × 23.39 in) has twice the area of A3 (11.69 × 16.54 in). Two A3 sheets side by side make one A2.
What is the exact A2 size in inches for printing?
The exact inch dimensions are 16.5354 × 23.3858 inches, though most printing services round to 16.54 × 23.39 in.
What are the A2 dimensions in inches for a poster?
A standard A2 poster measures 16.54 inches wide by 23.39 inches tall. Use a frame labelled “A2” to avoid gaps.
How many A4 sheets fit on an A2 sheet?
Four A4 sheets (8.27 × 11.69 in each) fit exactly into one A2 sheet.
What is the A2 pixel size at 300 DPI?
At 300 DPI, A2 requires 4961 × 7016 pixels — about 34.8 megapixels.
What is the weight of A2 paper in grams?
Weight depends on the gsm of the paper stock. Standard 80 gsm A2 paper weighs about 9.9 grams per sheet; 200 gsm cardstock weighs roughly 25 grams.
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Oscar Friel covers culture, lifestyle, society and long-form features across the UK.