Sometimes, you need to define a specific font-size, to do so, you just need to add the font-size attribute with the desired value.

Just like the rest of the framework, those values are based on your harmonic ratio.

The value 0 is the size of the base value, the value 1 is equal to the size of a 'h3', the value 2 is equal to a 'h2', and so on.