Often within my workflow in Substance Designer, I would create multiple different bevel sizes to get a different look or feel to bricks, stones, tiles, and many other patterns for a more believable look, along with some subtle variation. I've combined this into 1 simple and easy to use node that takes a black and white mask input and outputs random 4 different random bevel sizes with easy to use controls. If you need more than 4 sizes, you can always blend 2 of these nodes together.
Node Controls:
This package includes the .SBS, so you can also learn how it was made and even extend the functionality.