Brochure sizes: A4 tri-fold, bi-fold and folded sizes
A brochure has two sizes: the flat sheet and the folded piece. The classic is the A4 tri-fold — a 297 × 210 mm sheet folded twice into three panels, 99 × 210 mm folded. In the US it is the letter tri-fold, 11 × 8.5 in folded to about 3.67 × 8.5 in.
| Brochure | Flat sheet | Folds | Folded | Panels |
|---|---|---|---|---|
| A4 tri-fold | A4, 297 × 210 mm | 2 | 99 × 210 mm | 6 |
| A4 bi-fold to A5 | A4, 297 × 210 mm | 1 | 148 × 210 mm | 4 |
| A3 bi-fold to A4 | A3, 420 × 297 mm | 1 | 210 × 297 mm | 4 |
| A4 accordion (Z-fold ×3) | A4, 297 × 210 mm | 3 | ≈ 74 × 210 mm | 8 |
| US letter tri-fold | 11 × 8.5 in | 2 | ≈ 3.67 × 8.5 in | 6 |
The tuck-in panel
On a roll-fold tri-fold the panel that folds inside is usually made 2–3 mm narrower — for example 100 / 100 / 97 mm — so it does not buckle. Printers set this differently, so start from your printer’s template.
In the Twelver chat each side of a brochure is built on an exact canvas — 1754 × 1240 for A4, exported at double density to 3508 × 2480 — with headings, prices and contacts set as real text. Single-sheet sizes are in flyer sizes.
Frequently asked questions
What size is a tri-fold brochure?
How many panels does a brochure with three folds have?
Try it yourself
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