A3 Flyers Leaflets
Similar to a brochure, the open A3 flayers format leaflet is appreciated for its large printable surface, which can also mean optimal reading comfort. In addition, it offers many folding possibilities. But what do we know about the open A3 format leaflet which can be translated into a closed A4 leaflet or an accordion leaflet? Here are some answers. If you'd like to learn more about the different formats available for your flyers, check out our flyer format guide.
Characteristics of the A3 printing format
The A3 printing format is a standardized format of the A range, it is the 4th largest format after the A0, A1, A2 formats. On the other hand, in term of printable surface, it precedes the formats A4, A5 and A6, which are all part of the range A. It is about a standardized form, worked out by professor Lichtenberg, at the end of the XVIIIth century, towards the year 1789. But it is in 1922 that its standardization was established by Portsmann and the German DIN 476, then by the ISO 216 of 1975, applicable in France and in the whole world.
The A3 format is easily recognizable by the proportion between the length and width which gives , and its dimensions of 420 mm x 297 mm. In practice, an A3 format represents the half of a A2 format but the double of the A4 format, that is to say 2 A4 papers, arranged side by side, according to the length.
Use of the A3 open format flyer
The use of the A3 printing format is very widespread in the world of advertising, which appreciates it for advertising posters, small posters and also for flyers. It is chosen for its manageability, as well as for its important printing surface allowing to spread a wide and complete information.
Indeed, in the context of the printing of leaflets, the A3 flayers format leaflet allows to obtain a leaflet with 2 parts. With a central fold along the width of the paper, we obtain a closed A4 format. Similarly, for 3-panel folders, you can choose between accordion folding, rolled folding and window folding.

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