A3 Print Size for EtsyThe poster size that unlocks UK, EU & Australian buyers
3508×4961 pixels. 297×420 mm. The #1 poster size in international markets. Here's everything you need to create A3 digital downloads that sell globally.
What Is A3 Print Size?
A3 measures 297×420 mm (11.69×16.54 inches). It's the international poster size — exactly double A4 in area and the go-to wall art format in the UK, Europe, Australia, and New Zealand.
A3 is part of the ISO 216 standard, which defines all A-series paper sizes. The defining feature of this system is the aspect ratio: every A-size shares the same 1:1.414 proportions. Fold an A2 in half and you get an A3. Fold A3 in half and you get an A4. Your artwork composition scales perfectly across the entire series without cropping.
For Etsy sellers, A3 is the sweet spot between everyday A4 prints and statement-piece A2 posters. It's big enough for framed wall art but small enough that buyers can print it at local shops without specialty pricing. For a full overview of every Etsy size, see the complete Etsy print sizes guide.
A3 Pixel Dimensions at 300 DPI
The math: convert millimeters to inches (divide by 25.4), then multiply by 300. Width: 297 ÷ 25.4 × 300 = 3508 pixels. Height: 420 ÷ 25.4 × 300 = 4961 pixels.
A3 at Different DPI Settings
| Resolution | Pixels (Portrait) | Use Case |
|---|---|---|
| 72 DPI | 842 × 1191 | Screen preview only — not for print |
| 150 DPI | 1754 × 2481 | Draft proofing, viewing distance over 2 feet |
| 300 DPI | 3508 × 4961 | Print standard — use this for Etsy |
Always create your A3 files at 300 DPI. This is the professional print standard and what buyers expect from Etsy digital downloads. For more on why 300 DPI matters, see best resolution for Etsy printables.
A3 vs 11×17 (Tabloid) — The US Equivalent
If you're in the US, the closest paper size to A3 is Tabloid (also called Ledger or ANSI B) at 11×17 inches. They look similar, but they are not interchangeable.
| A3 (ISO) | Tabloid / 11×17 (ANSI) | |
|---|---|---|
| Dimensions | 297 × 420 mm (11.69 × 16.54 in) | 279 × 432 mm (11 × 17 in) |
| Pixels @ 300 DPI | 3508 × 4961 | 3300 × 5100 |
| Aspect Ratio | 1:1.414 (ISO A-series) | 1:1.545 |
| Width | 0.69 inches wider | 0.69 inches narrower |
| Height | 0.46 inches shorter | 0.46 inches taller |
| Used In | UK, EU, Australia, NZ, Asia | US, Canada |
The key takeaway: you cannot simply resize an A3 file to Tabloid (or vice versa) without cropping or adding white bars. The aspect ratios are fundamentally different. An A3 design will look slightly squished or require trimming when printed on 11×17 paper.
For Etsy sellers, the practical solution is to offer both. International buyers search for “A3” while US buyers search for “11×17”. Including both in your listing covers the entire English-speaking market. For the US Letter equivalent of A4, the same principle applies.
A3 vs A4 vs A2 — Size Comparison
| Size | Dimensions (mm) | Dimensions (in) | Pixels @ 300 DPI | Best For |
|---|---|---|---|---|
| A4 | 210 × 297 | 8.27 × 11.69 | 2480 × 3508 | Home printing, everyday wall art |
| A3 | 297 × 420 | 11.69 × 16.54 | 3508 × 4961 | Framed wall art, gallery walls |
| A2 | 420 × 594 | 16.54 × 23.39 | 4961 × 7016 | Statement pieces, large posters |
Each step in the A-series doubles the area. A3 is exactly twice A4 and exactly half A2. All three share the same 1:1.414 aspect ratio, so your design composition stays identical at every size — no cropping, no re-composing.
A3 sits in the sweet spot: it's large enough to make a visual impact on a wall, but small enough that affordable frames are widely available. A2 is reserved for statement pieces and gallery walls where the buyer is ready to invest in custom framing.
For an understanding of how these ratios differ from US print sizes, see the Etsy print ratios guide.
Why A3 Matters for Etsy Sellers
Most US-based Etsy sellers only offer inch-based sizes. That means they are invisible to millions of international buyers who search in ISO paper sizes. A3 is where that gap hurts the most.
A3 is the #1 poster size in metric countries
In the UK, EU, Australia, and New Zealand, A3 is what buyers search for when they want framed wall art. It fills the same niche as 11×14 or 12×18 in the US — but with completely different dimensions.
A3 frames are everywhere internationally
IKEA, Amazon UK, Myer (Australia), and every high street frame shop stock A3 frames. Buyers can order a frame the same day they download your file. This frictionless experience drives repeat purchases and 5-star reviews.
Etsy UK has dedicated A3 search categories
Buyers on Etsy UK specifically search for “A3 print”, “A3 poster”, and “A3 wall art”. If your listing tags only mention US sizes, you will not appear in these searches. Adding “A3” to your title and tags is a zero-cost SEO win.
The cost of adding A3 is essentially zero. Since all A-series sizes share the same ratio, one master design produces A5, A4, A3, A2, and A1 with simple scaling. You're doubling your addressable market with minutes of extra work per listing — or seconds, if you automate it.
Which Countries Search for A3 Prints?
Every country except the US and Canada uses ISO A-series paper as the standard. But some markets are especially active on Etsy for A3 poster purchases:
Primary A3 Markets
- United Kingdom — largest Etsy market after US
- Australia — strong wall art culture
- Germany — Europe's biggest market
- New Zealand — same frame sizes as AU
Secondary A3 Markets
- France — active Etsy buyer base
- Netherlands — design-conscious market
- Japan — ISO A-series standard
- South Korea — growing digital art demand
Etsy's global marketplace means both size systems matter. Offering ISO sizes (A5, A4, A3) alongside US sizes (5×7, 8×10, 11×14, 16×20) in a single listing maximizes your market reach. For guidance on bundling sizes, see how many sizes to offer for Etsy printables.
How to Create A3 Files for Etsy
1. Set Your Canvas to 3508×4961 Pixels
Create a new document at exactly 3508×4961 pixels with 300 DPI resolution. Do not set dimensions in millimeters and let the software calculate pixels — rounding differences between design tools can produce slightly off dimensions. Use exact pixel values.
2. Design at A3 First, Then Scale Down
Always start with your largest size. Creating at A3 resolution means you can scale down to A4 and A5 without any quality loss. Going the other direction — upscaling an A4 file to A3 — doubles the area and will make the image look soft or pixelated.
3. Export as JPG / JPEG at 300 DPI
JPG (also called JPEG) maintains full print quality while keeping files well under Etsy's 20 MB upload limit. PDF is an alternative for text-heavy printables like planners. For detailed format guidance, see what files to include in Etsy digital downloads.
4. Add Bleed for Professional Printing (Optional)
If your buyers will take A3 files to professional print shops, a 3 mm bleed on each side ensures nothing gets cut off at the edges. With bleed, your A3 canvas becomes 303×426 mm (3579×5032 pixels). For most Etsy digital downloads, bleed is optional — mention “print at actual size” in your listing instead.
Skip the manual work: SnapToSize generates A3, A4, A5, and all US sizes automatically from one upload — at 300 DPI, professionally named, ready for Etsy. See how to resize images for Etsy for a complete walkthrough.
Packaging A3 with Other Sizes in Your Listing
International buyers want to find their sizes immediately. The most effective approach is a ZIP file with clear folder structure that separates US and international sizes:
Recommended ZIP Structure
artwork-name.zip
├─ US-Sizes/
├─ artwork_5x7_300dpi.jpg
├─ artwork_8x10_300dpi.jpg
├─ artwork_11x14_300dpi.jpg
└─ artwork_16x20_300dpi.jpg
└─ International-Sizes/
├─ artwork_A5_300dpi.jpg
├─ artwork_A4_300dpi.jpg
└─ artwork_A3_300dpi.jpg
With JPG / JPEG files, the full bundle stays well under Etsy's 20 MB per-file limit. Mention “Includes A3, A4, and A5 international sizes” prominently in your listing title and description — international buyers specifically search for these terms.
For a deeper look at how many sizes to include and how to organize them, see how many sizes to offer for Etsy printables and the Etsy 20 MB file limit guide.
Common A3 Mistakes Etsy Sellers Make
Creating at 72 DPI instead of 300 DPI
At 72 DPI, an A3 file is only 842×1191 pixels — a fraction of the 3508×4961 pixels needed for print quality. The result is a blurry, pixelated poster. Always verify your export is 3508×4961 pixels before uploading.
Confusing A3 with 11×17 (Tabloid)
A3 is 11.69×16.54 inches. Tabloid is 11×17 inches. They have different aspect ratios and are not interchangeable. Labeling an 11×17 file as “A3” means your international buyer's print will have incorrect proportions or get cropped by their printer.
Upscaling A4 to A3
A3 has double the area of A4. Upscaling a 2480×3508 pixel A4 file to 3508×4961 pixels will cause visible quality loss. The image will look soft, especially in detailed areas like text and fine lines. Always create your original at A3 resolution or larger, then scale down.
Not offering A3 at all
If your listings only include US sizes, you are invisible to international buyers searching for “A3 print” or “A3 poster” on Etsy. Adding A3 to your tags, title, and file bundle is a zero-cost way to reach the UK, EU, and Australian markets.
Forgetting that A3 ratio does not match US ratios
The ISO A-series ratio (1:1.414) is unique. It does not match 4:5, 2:3, or 3:4 — the common US frame ratios. You cannot crop a 2:3 file to A3 proportions without losing artwork. Each ratio family needs its own version. See Etsy print ratios explained.
A3 Framing Guide for Your Listing Description
Including framing guidance in your Etsy listing reduces buyer confusion and support requests. Here is what your A3 buyers need to know:
Copy this into your listing description: “This A3 file prints at 297×420 mm (11.69×16.54 inches). Standard A3 frames are available at IKEA, Amazon, and most frame shops. In the US, use a 12×18 frame with matting or IKEA's 40×50 cm frame.”
Providing this detail positions you as a professional seller and reduces “what frame do I need?” messages.
The Complete ISO A-Series for Etsy
A3 is most effective when offered as part of the full ISO lineup. Here is each size and its role in your Etsy shop:
| A-Series Size | Dimensions (mm) | Pixels @ 300 DPI | Best For |
|---|---|---|---|
| A5 | 148 × 210 | 1748 × 2480 | Small prints, greeting cards, planners |
| A4 | 210 × 297 | 2480 × 3508 | Home printing, standard wall art |
| A3 | 297 × 420 | 3508 × 4961 | Framed wall art, gallery walls, poster prints |
| A2 | 420 × 594 | 4961 × 7016 | Large posters, statement pieces |
| A1 | 594 × 841 | 7016 × 9933 | Oversized prints, gallery exhibitions |
All five sizes share the same 1:1.414 aspect ratio. One master design scales to every size without cropping. This is the most efficient ratio family to add alongside your US sizes.
For a tool that calculates exact pixel dimensions for any print size and DPI, see the Etsy print size calculator.
Frequently Asked Questions
A3 is 11.69 × 16.54 inches (297 × 420 mm). It is often rounded to 11.7 × 16.5 inches in informal references, but use the exact measurements when creating print files for Etsy.
A3 at 300 DPI is 3508 × 4961 pixels in portrait orientation. This is the standard resolution for print-quality Etsy digital downloads. The calculation: 297mm ÷ 25.4 × 300 = 3508 pixels wide, 420mm ÷ 25.4 × 300 = 4961 pixels tall.
No. A3 (11.69 × 16.54 inches) and Tabloid/11×17 (11 × 17 inches) are close but not identical. A3 is slightly wider and shorter, with a different aspect ratio — ISO 1:1.414 vs approximately 1:1.545. You cannot resize one to the other without cropping or adding white space.
Yes. A3 is exactly double A4 in area. A3 measures 297 × 420 mm while A4 measures 210 × 297 mm. Folding an A3 sheet in half gives you two A4 sheets with the same proportions.
A3 is ideal for wall art posters, botanical prints, nursery art, and gallery wall pieces. It is the standard poster size in UK, EU, and Australian markets — the most popular framed print size in international Etsy shops.
If you sell wall art or posters, yes. A3 is the most popular poster size in international markets. Missing it means losing UK, EU, and Australian buyers who specifically search for A3 on Etsy.
An A3 frame fits 297 × 420 mm prints. IKEA, Amazon, and most frame shops in the UK, EU, and Australia stock A3 frames. In the US, the closest standard frame is 12 × 18 inches with matting, or IKEA's 40 × 50 cm frame with a mat.
Upscaling A4 to A3 doubles the area and will cause visible quality loss — the image will look soft or pixelated. Always create your original artwork at A3 resolution (3508 × 4961 pixels) or larger, then scale down for smaller sizes like A4 and A5.
Free Etsy Print Size Cheat Sheet
All Etsy ratios and pixel dimensions at 300 DPI in one PDF. US sizes, international A-series, and file naming conventions.
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