How to establish px for min and max on media screen?

Question

how to define n determin coloumn in px

Answer 1

Standard width and height of screens:

https://css-tricks.com/snippets/css/media-queries-for-standard-devices/

How to set columns according to size of screen:

https://stackoverflow.com/questions/42714840/how-to-set-the-number-of-columns-according-to-the-size-of-the-screen