A Series Paper SizesĪs we have said just now, the A series is the more popular one of the two major variants. Let us start off this article with a basic understanding of the two major sizes used in the world, A and B. You can also find C sizes, but since those are mostly for envelopes, we will not bother too much about them.Īnd between A and B sizes, A size papers are used more commonly. However, when you look elsewhere in the world, paper sizes are generally categorized into A and B. It is mostly North America that sticks to letter sizes. Understanding International Paper Size Standards So, without further ado, let us get started. In this article, we will give you a complete rundown of understanding different paper sizes and give you an in-depth comparison between B5 vs A4 vs A5 sizes of paper. That way, you will be able to find the perfect paper size for your purpose. Understanding the different paper sizes according to ISO can help you out when you are buying a notebook or starting to write a journal.

Though the system might feel a bit confusing at first, especially for those living in the states, once you get to know about it, it is actually quite simple. The rest of the world uses what we call the International Organization for Standardization or ISO, for short, in determining a standard for different sizes of paper. However, when you step outside the country, especially in Europe and Asia, the sizing of papers is completely different. The dimension of letter size paper is 8.5 inches by 11 inches. In the United States and neighboring countries like Canada or Mexico, we are used to writing on papers that come in letter sizes.

B5 paper size