What is the actual column width in Bootstrap?

Question

css

Hey!
For comparison, 2 links:
getbootstrap.com/css/#grid-options - off. documentation
bootstrap-3.ru/css.php#grid-options - translated into Russian.
Off. The documentation says that the column width is ~62px (small devices) and ~81px (medium).
The Russian version has clear numbers of 60 and 78 pixels.
Where is the truth? Something tells me that the values ​​in the official documentation are correct, but why ~62? Approximately 62? How then to give instructions to the layout designer so that he draws everything clearly and competently? For I did not find an item in CSS or customization on the bootstrap site where the column width changes.

Answer 1

I think everything is in relative units, they are always interpreted in
pixels version.