GSM stands for grams per square metre and is the standard measurement used in the UK to describe the weight and thickness of paper. It refers to how much one square metre of paper weighs, which makes it a great, reliable way to compare different paper types, regardless of sheet size.
The higher the GSM number, the thicker and heavier the paper feels
Lower GSM papers are lighter and more flexible, while higher GSM papers are sturdier and more durable. GSM does not directly measure quality, but it strongly influences how the paper looks, feels and performs.
In everyday use, standard printer and copier paper is usually around 80gsm
This is lightweight and suitable for letters and documents. Slightly thicker paper, such as 90-120gsm, is often used for letterheads, work reports and flyers, offering a more professional feel without being too rigid. Notebooks are durable and have high-quality, 80-gsm pages.
For marketing materials, heavier paper is common
130-170gsm is frequently used for leaflets and folded flyers, as it holds its shape well while remaining easy for you to fold. 200-250gsm is typical for brochures, posters and high-quality prints, giving a premium appearance. Business cards usually start at 300gsm or higher, providing a strong finish. For folded leaflet printers Cheltenham, professionals such as https://wheatleyprinters.co.uk/printing-services/marketing-materials/folded-leaflet-printers/cheltenham/ are on hand to advise.
GSM also affects printing costs and postage
Heavier paper costs more to produce and may increase your mailing charges, so it’s important to balance appearance with practicality. Understanding GSM helps you choose the right paper for your project.
