InviteBatch teamIn this guide
The short answer: A4 is 21 × 29.7 cm, A3 is 29.7 × 42 cm, A2 is 42 × 59.4 cm and A1 is 59.4 × 84.1 cm. Each A size is exactly half of the size above it, so two A4 sheets make an A3 and two A3 sheets make an A2. For a sharp print, the file needs about 300 pixels per inch (300 dpi). The pixel sizes are in the table below.
Print an A4, A3 or A2 poster from 1 copy
Upload a PDF or image. We check the resolution as soon as you upload, show the delivered price, then print and post it to you. One A3 poster is $26.02 delivered in the UK.
Print a poster →A2 postersA paper sizes: A0 to A6
| Size | Centimetres | Millimetres | Inches | Pixels at 300 dpi |
|---|---|---|---|---|
| A0 | 84.1 × 118.9 cm | 841 × 1189 mm | 33.1 × 46.8″ | 9933 × 14043 |
| A1 | 59.4 × 84.1 cm | 594 × 841 mm | 23.4 × 33.1″ | 7016 × 9933 |
| A2 | 42 × 59.4 cm | 420 × 594 mm | 16.5 × 23.4″ | 4961 × 7016 |
| A3 | 29.7 × 42 cm | 297 × 420 mm | 11.7 × 16.5″ | 3508 × 4961 |
| A4 | 21 × 29.7 cm | 210 × 297 mm | 8.3 × 11.7″ | 2480 × 3508 |
| A5 | 14.8 × 21 cm | 148 × 210 mm | 5.8 × 8.3″ | 1748 × 2480 |
| A6 | 10.5 × 14.8 cm | 105 × 148 mm | 4.1 × 5.8″ | 1240 × 1748 |
A sizes follow the ISO 216 standard, used in the UK, Europe and most of the world. The US and Canada mostly use inch sizes instead (see below).
Which poster size should I choose?
| Size | Best for | Seen from |
|---|---|---|
| A4 | Notices, menus, certificates, small posters, price lists | Arm's length |
| A3 | Event posters, shop windows, noticeboards, wall art | 1–2 metres |
| A2 | Wedding welcome signs, room posters, wall art | Across a room |
| A1 | Large display and event posters, exhibitions | Across a hall |
Tip: a welcome sign at a wedding or party is usually A2 or larger, so guests can read it from the door.
US poster sizes
| Size | Inches | Centimetres |
|---|---|---|
| Letter | 8.5 × 11″ | 21.6 × 27.9 cm |
| Tabloid | 11 × 17″ | 27.9 × 43.2 cm |
| Medium poster | 18 × 24″ | 45.7 × 61 cm |
| Large poster | 24 × 36″ | 61 × 91.4 cm |
We print 11×17″ and 18×24″ posters too, delivered to the US and Canada.
Invitation and card sizes
| Card | Inches | Millimetres | Common use |
|---|---|---|---|
| 7 × 5″ | 7 × 5″ | 178 × 127 mm | Wedding invitations (most popular in the UK) |
| 6 × 4″ | 6 × 4″ | 152 × 102 mm | Party invitations, save the dates, postcards |
| Square 6 × 6″ | 6 × 6″ | 152 × 152 mm | Modern wedding and party invitations |
| A5 | 5.8 × 8.3″ | 148 × 210 mm | Invitations, menus, flyers |
| A6 | 4.1 × 5.8″ | 105 × 148 mm | RSVP cards, flyers, postcards |
Printing invitations? 20 square invitations with envelopes are $25.44 delivered in the UK. See invitation printing.
How to get a sharp print
- Use 300 dpi for anything seen up close (cards, A4, A3). Posters seen from a distance still look good at 150 dpi.
- Export a PDF if you can. Text and lines stay crisp at any size. In Canva, choose Download → PDF Print.
- Keep text away from the edges, at least 5 mm in, so nothing is trimmed off.
- Check before you pay. Our upload shows your file at real size and warns you if the image is too small for the size you picked.
What we print
We print A4, A3 and A2 posters and prints, US 11×17″ and 18×24″ posters, and 6×4″, 7×5″ and square cards, from 1 copy, delivered to the UK, US, Canada and 13 EU countries. We don't print A1 or A0, multi-page documents or booklets.