  What are the face-probabilities of a cuboidal die, i.e. a die with different
side-lengths? This paper introduces a model for these probabilities based on a
Gibbs distribution. Experimental data produced in this work and drawn from the
literature support the Gibbs model. The experiments also reveal that the
physical conditions, such as the quality of the surface onto which the dice are
dropped, can affect the face-probabilities. In the Gibbs model, those
variations are condensed in a single parameter, adjustable to the physical
conditions.
