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:

Bevel Size Bevel Size Variance Multiplier Bevel Bias Corner Type Smoothing Mask Dilation This package includes the .SBS, so you can also learn how it was made and even extend the functionality.