Sizes have been generated using a Modular Scale: 1.250 and calculated via a global baseline of 1rem (10px).

The defined Modular Scale calculates your font sizes based on your $base-font-size and $global-scale-ratio

e.g.

$global-scale-ratio: 1.250; // Major Third

$base-font-size: 16; // Our decided baseline font-size value

$size-alpha: round(50 * 1.250) = 62.5 | 62px | 6.2rem

The Sizes are calculated on the previous size defined in the hierarchy e.g. $size-beta will be passed in to determine the outcome of $size-alpha.

These values can of course be overridden. e.g.

$size-alpha: _fs($size-beta)

...... could also be:

$size-alpha: 50;