There are almost more than 20 card sizes. And the purpose of using all these different card sizes is completely different.
Paper sizes are as large as card sizes. Even those in the printing business do not try to keep all of these paper and card sizes in mind. They look from somewhere when they need it.
The information in the place they look at must be correct. This is why it is very important to have serious resources on this issue.
If you are producing content on the internet, you need to know that you take great responsibility.
Most people do not spend enough work on the accuracy of what they are reading on the Internet.
You have to make sure that you are responsible for everything you write for this reason. Because you will affect the lives of people who read your content in a small or large way.
Never mind what a negative effect would turn out to be a punishment for you. The point you need to focus on is how great positive feedback will reward you.
In this article, I shared other information along with your a2 card size information. I hope you're not bored.