From the name, I thought it was going to be about fractal dimensions[1] (:

So on that tangent ... you can measure that value for ordinary objects using the "box counting" method[2], to get a notion of objects being "1.3 D" and such.

[1]https://en.wikipedia.org/wiki/Fractal_dimension

[2]https://pages.cs.wisc.edu/~ergreen/honors_thesis/dimension.h...