Are the proportions of elements, site blocks always the same on different devices? on smartphone, tablet, PC?

Question

Adaptive design

Are the proportions of elements, site blocks always the same on different devices? On sizes 320-768-1200
If you take a ruler and measure, for example, the “product card” block on a smartphone, tablet, PC?
Will the length / width of the block be the same everywhere or different?
After all, the distance from the screen of a smartphone and a PC is different.

Answer 1

This is how the designer draws for you.
On the desktop, your card can be horizontal, and on mobile it can be rearranged into a column. Here the taste and color - all designers are different.