B4 refers to the paper size, 257mm×364mm, which belongs to the medium format and is one of the commonly used specifications for copy paper.

Besides, what are the A3 paper, A4 paper, 8K paper and 16K paper we often talk about? What size paper is it? Do you all know? What is the paper size we usually use? Let's follow me to find out!

Common paper can be divided into two categories according to its size: A and B:

1. The square paper we usually talk about is Class A paper.

Usually cut into printing paper sizes are:

A 1 size: also known as large format, the specific size is 594 * 841mm.

A2 size: Also known as Big 4k, the specific size is 420*594mm.

A3: Also known as Big 8k, the specific size is 420mm×297mm.

A4: also known as Da 16k, with a specific size of 297mm×2 10mm.

A5: Also known as Da 32k, the specific size is 2 10 mm× 148 mm.

A6: also known as Da 64k, with specific dimensions of 144mm× 105mm.

2. the normal paper we usually say is class B.

Usually cut to the following dimensions:

B 1: the specific size is 707 *1000 mm.

B2: The specific size is 500 * 707mm.

B3: The specific size is 353*500mm.

B4: The specific size is 250*353mm.

B5: The specific size is 176*250mm.

Now that you know the size of the paper, don't make mistakes when printing!