We'll need a little math to step in to help us so that we'll be able to build a report of values between each element of our text– for it to appear harmonious, rhythmical, and more readable.
You may not know it – but you look and use the classic typographic scale every time you fire up Adobe InDesign, Microsoft Word, or any modern software: the standard point sizes that are given to you are just that.
In a scale, each element answers to the scaling property, meaning that where x is a value, rx or it's ratio must be present inside the scale as well.
That ratio element is the foundation of the scale – and it's the numeric value we are going to work on.
The classic typographic scale is made of these values: 6, 7, 8, 9, 10, 11, 12, 14, 16, 18, 21, 24, 36, 48, 60, 72. You recognize it now, don't you?