What pixel size is A4 at 300 DPI?

A4 at 300 DPI corresponds to 2,480 x 3,508 pixels, derived from the physical dimensions of 8.27 x 11.69 inches multiplied by 300 dots per inch. This results in roughly 8.7 megapixels, which any modern smartphone or digital camera can easily produce natively. For example, when uploading print-ready files on Etsy for print-on-demand T-shirts or art prints, designing at this resolution ensures crisp output without pixelation. To prepare your artwork correctly, always create or export your images at 300 DPI with these pixel dimensions to meet professional printing standards and avoid quality issues.

What pixel size is A3 at 300 DPI?

A3 size at 300 DPI translates to 3,508 x 4,961 pixels, based on measurements of 11.69 x 16.54 inches multiplied by the standard 300 dots per inch. This totals around 17.4 megapixels, which most modern smartphones and standard DSLR cameras can capture without difficulty. For instance, if you are creating wall art or posters for Etsy that require higher detail than A4, using these pixel dimensions guarantees sharp prints. To ensure your print-ready files are accepted by print-on-demand services, always design or export at this resolution to maintain image clarity.

What pixel size is A2 at 300 DPI?

At 300 DPI, A2 measures 4,961 by 7,016 pixels, calculated from 16.54 x 23.39 inches times 300 dots per inch. This equates to about 34.8 megapixels, a resolution slightly higher than many phone cameras can natively shoot. Most phone cameras capture around 12 to 20 megapixels, so achieving native A2 resolution often requires increasing file size with AI upscaling tools. For Etsy sellers preparing high-quality large prints, it's advisable to create files at these exact dimensions or use AI upscaling to fill gaps for crisp details on A2-sized print-on-demand products.

What pixel size is A1 at 300 DPI?

A1 at 300 DPI is 7,016 x 9,933 pixels, calculated from physical dimensions of 23.39 x 33.11 inches multiplied by 300 dots per inch. This results in an enormous 69.7 megapixels, far beyond the native resolution of most cameras and phones. Etsy sellers offering large-format prints in A1 size should plan to significantly upscale files using AI or specialized software rather than relying on native captures. To prevent blurry prints on print-on-demand products, prepare files at these pixel dimensions or use quality upscaling techniques for best results.

Why do all A-sizes share the same aspect ratio?

ISO 216 was designed so each A-size is exactly half of the next size up — A3 folded in half is A4. The mathematical consequence is that all A-sizes share an aspect ratio of 1:√2 (approximately 1:1.414). This is unique among paper standards and makes A-series ideal for designing once and printing at multiple sizes.

Can I use a US Letter (8.5x11) file for A4?

Using a US Letter file sized 8.5 x 11 inches for A4 print files is not recommended without adjustment, as the two paper sizes differ in aspect ratio. US Letter has an aspect ratio of roughly 1:1.294, whereas A4’s ratio is closer to 1:1.414, meaning that using a US Letter file for A4 prints will either crop content or add letterboxing. For example, Etsy buyers expecting A4 files may find parts of their artwork cut off or with unwanted borders. To avoid this, always create or export files specifically sized for A4 if you want to serve an international audience accurately.

Is A2 the same as 18x24 inches?

A2 size and 18x24 inch prints are similar in scale but have different aspect ratios, making them incompatible without cropping or distortion. A2 measures exactly 16.54 x 23.39 inches with an aspect ratio of about 1:√2, while 18x24 inches uses a 3:4 ratio. This means that artwork designed for one will not fit the frames or displays intended for the other without losing parts of the image. Etsy sellers targeting international customers should provide correctly sized A2 files to ensure the artwork fits typical A2 frames and to maintain image integrity.

Should I include A-series files in my Etsy listings?

Including at least one A-series size file, typically A2 or A3, in your Etsy listings is highly recommended because these sizes accommodate a wide range of international customers. Etsy allows up to five digital files per listing, so providing an A-series file helps cover all smaller A-sizes due to their consistent aspect ratio. This approach streamlines your listings and prevents excluding 40 to 60 percent of your potential international buyers who expect A-size formats rather than US Letter or other dimensions. Always prepare and upload print-ready files in A-series dimensions to maximize your market reach.

Size Guide

A4, A3, A2 Print Setup for International Etsy Sellers

A4, A3, and A2 print pixels for Etsy require exact dimensions like 2480x3508 px (A4) at 300 DPI to ensure quality prints. These ISO sizes share a 1:√2 aspect ratio, ideal for international POD formats.

5 min read · April 26, 2026 · Updated April 26, 2026

The ISO A-series is the global standard outside North America. Every print shop, IKEA frame, office printer, and stationery store in the UK, EU, Australia, and most of Asia uses A-sizes by default. At 300 DPI: A4 = 2,480 × 3,508 pixels (8.7 MP), A3 = 3,508 × 4,961 pixels (17.4 MP), A2 = 4,961 × 7,016 pixels (34.8 MP), and A1 = 7,016 × 9,933 pixels (69.7 MP).

All A-sizes share the same ratio (1:√2 ≈ 1:1.414), which means a single A-series master file scales losslessly across every size. For Etsy sellers ignoring international buyers, that's roughly 60% of the global wall-art market unfilled. Adding one A-series file to your 5-ratio bundle changes the math.

Pixel dimensions for every A-size at 300 DPI

Size	Millimetres	Inches	Pixels @ 300 DPI	MP
A6	105 × 148	4.13 × 5.83	1,240 × 1,748	2.2
A5	148 × 210	5.83 × 8.27	1,748 × 2,480	4.3
A4	210 × 297	8.27 × 11.69	2,480 × 3,508	8.7
A3	297 × 420	11.69 × 16.54	3,508 × 4,961	17.4
A2	420 × 594	16.54 × 23.39	4,961 × 7,016	34.8
A1	594 × 841	23.39 × 33.11	7,016 × 9,933	69.7
A0	841 × 1189	33.11 × 46.81	9,933 × 14,043	139.5

Each A-size is exactly half of the next size up — A3 folded in half is A4, A4 folded in half is A5. This recursive halving is why all A-sizes share the 1:√2 ratio.

Why ISO A-series dominates outside North America

If you sell digital downloads only to the US and Canada, A-series feels like an afterthought. But the moment you cross any border, the calculus flips:

UK, EU, Australia, and most of Asia use A-sizes exclusively. Every print shop, every office printer, every stationery aisle. A buyer in Germany asking for "a poster" means A2 or A1, not 18x24.
IKEA frames worldwide are sized for A-series. The popular RIBBA 50×70 frame fits A2 with the included mat, not 18x24. North American IKEA stores stock both because the markets are mixed; everywhere else, A-series only.
Office printers default to A4. Buyers printing at home in any non-US country put A4 paper in the printer by default. A US Letter (8.5x11) file printed on A4 paper crops awkwardly.
International Etsy traffic is huge. Etsy reports the UK, Germany, France, Australia, and Canada as top buyer markets after the US. Skipping A-series means leaving roughly 40-60% of your potential international buyers without a usable file.

The fix is small: include one A-series file (typically A2 or A3) in your standard 5-ratio bundle. That single file unlocks the entire A-series market because all sizes share the same ratio — the buyer prints at whichever A-size their frame requires.

When buyers specifically want A-series

European, UK, Australian buyers with IKEA frames. The dominant case. List explicitly as "fits A2 ISO frames including IKEA RIBBA 50x70" to capture this audience directly.
Office and home printer compatibility. Buyers wanting to print at home or work without going to a print shop need A4 (the default office paper size). A4 prints fit standard office printers, document folders, and binders.
Greeting cards and stationery. A6 and A5 are the standard sizes for greeting cards, postcards, and small printables. Sellers offering "printable card" listings typically default to A-sizes for international compatibility.
Architecture, technical drawing, and large-format design. A1 and A0 are the standard architectural drawing sizes globally. Wall art sized at A1 or A0 fits architectural firms, design studios, and large commercial spaces.

Common A-series mistakes

1. Confusing A2 with 18x24 inches

A2 is 16.54 × 23.39 inches with a 1:√2 ratio; 18x24 is 3:4 ratio. They're close in physical size but use different frames and aspect ratios. A buyer with an A2 frame cannot use an 18x24 file without cropping or borders.

2. Designing one file at A4 and assuming it scales to A2

It does (same ratio), but only if your A4 file is high enough resolution. An A4 file at 2,480 × 3,508 px doesn't have the pixels to print sharp at A2 (which needs 4,961 × 7,016). Always design at the LARGEST A-size you plan to support, then downscale to smaller sizes.

3. Forgetting the metric measurement system in international listings

A buyer in Germany measures their wall in centimeters. A US-only listing that says "fits 18x24 inch frames" is confusing for the German buyer. Include both inches and millimeters/centimeters in international listings.

4. Mixing US Letter paper (8.5x11) with A4

US Letter is 8.5 × 11 inches; A4 is 8.27 × 11.69 inches. Different ratios. A US Letter file printed on A4 paper has visible white space at the bottom or gets cropped. For international buyers, deliver A4 specifically.

5. Skipping A-series entirely from "US-only" shops

Most Etsy shops based in the US still get 20-40% international orders. A bundle without A-series options leaves all those buyers either using your file at the wrong size or asking for a custom A-series file via convo. Add one A-series option to your bundle.

One A-series master, every A-size

Because every A-size shares the 1:√2 ratio, a single high-resolution master scales losslessly down to all smaller A-sizes:

Design at A1 (7,016 × 9,933 px). This is the largest A-size most sellers need to support. Designing at A1 means A2, A3, A4, A5, and A6 all downscale losslessly.
If A1 is overkill, design at A2 (4,961 × 7,016 px). Still supports A3 through A6 perfectly. Skip A1 if you don't expect commercial-scale print orders.
Deliver a single A2 file in your Etsy bundle. Title it "A-series file (prints at A2, A3, A4, A5)" so buyers know one file covers all the smaller sizes they might want.
Stamp 300 DPI metadata. Critical: international print shops are particularly strict about DPI metadata since A-series prints often go to professional shops, not home printers. Use the free DPI fixer if your export tool defaults to 72.

For a complete 5-ratio Etsy bundle, the standard structure is: 2:3 (24x36 or 12x18), 3:4 (18x24 or 12x16), 4:5 (16x20 or 8x10), 11:14 (11x14), and ISO A-series (A2 master). This covers virtually every standard frame globally.

Frequently asked questions

Related guides

Best Wall Art Sizes for Etsy

Why A-series sits in the 5-ratio bundle alongside US sizes.

18x24 Print Pixel Requirements

The US-frame neighbor of A2 — close size, different ratio.

Ship A-series + US sizes from one upload

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