Here's why:
* GSM measures weight: GSM stands for grams per square meter. It tells you how much a sheet of paper weighs per square meter of surface area.
* Millimeters measure length: Millimeters measure the thickness of the paper.
Think of it like this:
* GSM is like the density of the paper. A higher GSM means the paper is heavier and denser.
* Millimeters are like the height of the paper.
To find the thickness of 120 gsm paper, you would need additional information, such as:
* The type of paper: Different types of paper (e.g., bond paper, cardstock) have different thickness at the same GSM.
* The manufacturer's specifications: Paper manufacturers often provide information on the thickness of their paper in millimeters, which can be correlated to GSM.
Let me know if you have any other questions.
