A poster is an advertising medium consisting of a sheet of paper or other printed material with some kind of visual message (text, images, drawings, etc.) that acts as an advertisement to disseminate information, either about an event or a specific product or service.


Posters can be printed in any custom size that comes to mind, but the most common sizes are as follows: A1, A2, A3, 70x100, 50x70, etc.


Generally the posters are placed on a fixed support: a wall, display, shop window, etc.

In these cases the posters are printed on one side in one of the following ways:

• colour (four-colour)

• in black

• in Pantone colours

• a combination of all of them

In certain circumstances, we may find the need to print the posters on both sides, such as on hanging posters in shops, so that they can be seen from all angles.


The most commonly used medium for printing posters is coated paper. Although it is also common to print on offset or recycled paper. And occasionally on some specific speciality paper.

The weights for the medium vary depending on the size. However, they tend to be rather low weights: between 90 and 150 grams.


It is a good idea to correctly study the most suitable weight for the paper to be used in the posters, since it is not advisable to make the poster too heavy. If it is too heavy, it may drop off the support when hung.

In addition, it is not a good idea for them to be too light, which would affect their durability.