Is it correct to use 2 font sizes?

Question

Electronic commerce

Hello!
How correct is it to use two font sizes to highlight logical areas?
For example https://sterngroup.ru/tovar/ats22d62q/
Menu on the left, description tabs on the right. The product description test is slightly larger than the menu. Or is it correct to do everything with a font of the same size?

Answer 1

So that you do not have problems with what font size to use, there are such services: https://www.gridlover.net/try . As soon as you start creating any projects from scratch, you immediately set the default sizes of the elements for the main parts of the site. There are also many presets (scale factor). And you can immediately see how the vertical rhythm is observed on the page.