Understanding Poster Pixel Size: A Quick Guide

When designing a poster or print material for advertising, it's crucial to consider the pixel size of your image. As the smallest unit of a digital image, pixels are tiny squares or rectangles that contain specific amounts of digital information, representing various colors and brightness levels.

If you're planning to print your design, make sure to measure the desired advertising space before printing to ensure your print fits the area perfectly. For reference, many people are familiar with the size of an A4 sheet of paper, which can help when thinking about aspect ratios.

To give you a better idea of the various A sizes available for printing, we've included a table below that compares the different options, providing an estimate of how big your finished print item will be once it arrives. To convert millimeters to centimeters, simply divide the mm values by 10. For example, 85 x 55 mm is equivalent to 8.5 cm x 5.5 cm.

To set up your document in your preferred design software program based on the size of the product you want, use these measurements as a reference. The table below is based on printing a portrait document at 300 dpi (dots per inch), resulting in high-quality prints.

At instantprint, we often receive queries about paper sizes and stocks, such as 'Is A3 bigger than A4?' or 'What size is my print with bleed?' Our team of experts, including myself as a Personal Artworker, are here to help you create print-ready designs. Below, we've included a quick guide to common paper sizes in pixels to make your design process easier.

Poster pixel size