The exact A1 dimensions are:
Millimeters: 594 × 841 mm
Inches: 23.39 × 33.11 inches
Pixels at 300 DPI: 7,087 × 10,017 pixels
Pixels at 72 DPI (web preview): 1,648 × 2,384 pixels
A1 in the A-Series Context
The A-series uses an elegant mathematical principle where each size is exactly half the previous one, maintaining a consistent 1:1.414 aspect ratio. A1 derives from A0 (which covers one square meter) by halving the longer edge. This relationship continues through the familiar sizes you encounter daily:
Size |
Dimensions (mm) |
Area |
Relationship to A1 |
|---|---|---|---|
A0 |
841 × 1189 |
1.0 m² |
2× larger |
A1 |
594 × 841 |
0.5 m² |
- |
A2 |
420 × 594 |
0.25 m² |
Half of A1 |
A3 |
297 × 420 |
0.125 m² |
Quarter of A1 |
A4 |
210 × 297 |
0.0625 m² |
Eighth of A1 |
Compared to US standard sizes, A1 is slightly smaller than the common 24 × 36 inch format (609.6 × 914.4 mm). This 15-20 mm difference affects bleed margins and frame compatibility, so designers should verify which standard their printer uses before finalizing artwork. |
Surface Area and Scale
A1 covers 0.5 square meters of wall space-double the area of A2 and substantial enough to create a focal point in most rooms. This surface area allows for detailed images and readable text at viewing distances of 2-5 meters, making it versatile for both intimate indoor spaces and larger commercial environments.
When you compare A1 to smaller poster sizes, the visual impact difference becomes clear. An A1 poster reaches approximately five times more viewers than an A3 in retail settings, according to visibility studies. Yet A1 remains portable and manageable, weighing 200-400 grams on standard paper compared to A0’s bulk, which often requires professional handling.
This balance of impact and practicality explains why A1 dominates European exhibition graphics and continues growing in popularity for everything from home décor to advertising purposes.
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Viewing Distance Considerations
Design elements for different viewing distances require distinct approaches. Close viewing (under 2 meters) allows for subtle details, texture, and fine typography that rewards examination. Distant viewing (3-5+ meters) demands bold shapes, high contrast, and simplified messaging that communicates your idea instantly.
For posters intended for trade shows or retail, design for both distances simultaneously. Create a compelling overall composition visible from across a room, with detailed elements that engage viewers who approach. This layered approach maximizes impact for advertising and promotional materials.
Text size recommendations by viewing distance:
1 meter: 24+ point body text readable
3 meters: 72+ point text remains clear
5+ meters: 144+ point minimum for quick comprehension
With design fundamentals addressed, selecting the right printing and material options ensures your A1 poster achieves the professional finish your artwork deserves.
