Google Font size 10.5 px (.5) the correct way and multibrowser support

Question

I am using Google font Open Sans and if I set the font to font-size 11px it looks big for the text I need and if I set it to 10px it looks small so I tested just for fun and

Answer 1

Convert your font size to a scalable unit like em or rem, and you can get what you are looking for.

By default, 1rem = 16px. so 10.5px = 0.65625rem.

The added benefit is accessibility. Some users may increase their default font size. Your text will scale accordingly if you use em or rem units. Pixel sizes won't.