B5
1
4.4
A paper size 176 by 250 millimetres often used for books and notebooks
- noun
- UK
:
B5
Surface Forms
Etymology
B5 comes from an international paper-size system: the letter B names a family of sizes that sit 'between' the A sizes, and the number 5 shows its size level, like the familiar A4. So B5 means the standard sheet 176 by 250 millimetres, which is why printers and publishers ask for that exact size.