Quick answer: A8 measures 52 × 74 mm, A9 measures 37 × 52 mm, and A10 measures 26 × 37 mm. These are very small ISO A-series formats intended for compact labels, tickets, inserts and miniature printed matter rather than ordinary reading pages.
Measurement note: dimensions are stated width × height in portrait orientation. Turn the sheet through 90 degrees for landscape use. Millimetres are the controlling values for ISO sizes; inch figures are rounded conversions.
A8, A9 and A10 dimensions
| Size | Millimetres | Centimetres | Inches |
|---|---|---|---|
| A8 | 52 × 74 mm | 5.2 × 7.4 cm | 2.05 × 2.91 in |
| A9 | 37 × 52 mm | 3.7 × 5.2 cm | 1.46 × 2.05 in |
| A10 | 26 × 37 mm | 2.6 × 3.7 cm | 1.02 × 1.46 in |
Practical uses
At these sizes, the limiting factor is not whether content technically fits but whether a person can read, hold and use it. A8 can support a short label, product card, loyalty stamp card, ticket or miniature instruction panel. A9 is suited to very brief identifiers, tokens and small inserts. A10 is closer to a label or tag than a conventional page.
- A8: compact information cards, tags, small vouchers and miniature artwork
- A9: tiny tickets, sample labels, numbered inserts and collection markers
- A10: identification slips, price labels, swatches and very small tokens
Typography and accessibility
Avoid shrinking a normal A4 layout. Start with the minimum readable type size, then design around the content that can be supported. High contrast, generous letter spacing, short lines and a single information hierarchy are more effective than densely packed text. Essential instructions, warnings or legal information may need a larger format regardless of aesthetic preference.
How to print small A sizes
Most printers do not feed A9 or A10 reliably as individual sheets. The normal production method is to impose many copies on A4, SRA3 or another parent sheet, print crop marks, and guillotine or die-cut the pieces. This improves registration, reduces handling and allows bleed.
- Create the finished artwork at the exact A8, A9 or A10 dimensions.
- Add the bleed required by the printer; 2–3 mm is common for small commercial pieces.
- Keep critical text well inside the trim because a 1 mm shift is visually significant on a tiny item.
- Impose copies on a parent sheet using professional layout or imposition software.
- Make a physical proof at 100% size before producing the full quantity.
Relationship to larger A sizes
Each step halves the area: two A9 pieces equal one A8 in nominal area, and two A10 pieces equal one A9. A single A4 sheet contains 16 A8 areas, 32 A9 areas or 64 A10 areas before allowing for gutters, bleed, crop marks and cutting loss.
Frequently asked questions
Are A8, A9 and A10 commonly stocked?
They are less commonly sold as office paper than A4, A5 or A6. Printers usually cut them from larger sheets.
Can A10 carry a QR code?
A QR code may technically fit, but scan reliability depends on module size, contrast, quiet zone, printing resolution and camera distance. Test the final printed piece with several devices; do not rely on a screen preview.
Which is best for a small label?
A8 provides the most usable space of the three. A9 and A10 should be selected only when the physical object or production method genuinely requires a smaller piece.
Common mistakes to avoid
- Entering rounded inch conversions when exact millimetres are available.
- Confusing finished trim with bleed or parent-sheet dimensions.
- Allowing the printer driver to scale automatically.
- Assuming a named size is identical in every national standard.
- Ordering paper before checking the printer’s minimum, maximum and supported weight.
- Judging readability only on a zoomed computer display.
For A8, A9 and A10 Paper Sizes, the most dependable approach is to retain the standard’s controlling unit, state the dimensions in the purchase order, use a supplier template and approve a full-size proof. This is especially important when the project moves between countries, software packages or production methods.
How to specify the size without ambiguity
For A8, A9 and A10 Paper Sizes, a reliable print specification states more than the familiar format name. Give the finished width and height, measurement unit, orientation, number of pages or panels, paper weight, surface, colour process, bleed, finishing and quantity. This prevents regional names and printer defaults from silently changing this particular job.
- Finished size: write width × height and identify portrait or landscape.
- Artwork size: distinguish the trimmed page from any larger bleed canvas or parent sheet.
- Stock: specify grammage or basis weight, coating, colour and recycled or certified requirements.
- Finishing: state folds, scoring, binding, drilling, corner rounding, lamination or mounting.
- Tolerance: ask the supplier what cutting, folding and registration variation should be expected.
When ordering A8, A9 and A10 Paper Sizes, a short name alone leaves important decisions unstated. A specification such as “finished size as stated above; portrait; 3 mm bleed; 170 gsm uncoated white stock; full colour both sides; scored where shown” is harder to misinterpret. When the format has regional variants, include the governing standard or exact dimensions every time.
Make a full-size physical proof
Screens do not communicate the physical scale of A8, A9 and A10 Paper Sizes reliably. Before a large order, print a representative page at 100%, trim it to the stated size and use it as the finished item will be used. Measure one horizontal and one vertical feature with a ruler. Fold it, place it in its envelope or holder where relevant, view it from the intended distance and ask someone unfamiliar with the design to find the main information.
A proof of A8, A9 and A10 Paper Sizes should check more than spelling. Look for text that is technically present but difficult to read, lines that sit too close to the trim, images whose important details enter a fold or binding area, barcodes or QR codes that do not scan, and stocks that crack or show through. For colour-critical work, a calibrated contract proof or press proof is more informative than an office print.
Sources and standards
The measurements and production guidance in this guide were checked against the following standards bodies, postal operators and print-platform specifications. Standards can be revised or withdrawn, so check the linked record when a contractual or regulated specification matters.