The Scene Scale Utility was developed for ASC to help manage proper scale across projects. It can be set globally in Shotgun, and propagate its scale setting out into all Assets, Shots and Tasks.
The tool works with Maya's default centimeter unit at 1/10th real world scale. The human characters measure approximately to 182cm for the male and 163cm for the female. At 1/10th scale those numbers translate to 18.2mu (Maya Units) and 16.3mu. A 1m cube is also present for comparison.
For real world scale, simply set the Scene Scale to 10 in Shotgun, or within the tool itself.