What does this number measure?
A cube easily held between two fingers. The dimension compares the edge of a representative die. Dice come in many sizes; the displayed value is not a rule imposed on all games.
Compare the stated dimensions
The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.
Source and limitations
Catalogue order of magnitude; a source is provided, but this measurement has not been individually audited.
Playing die; vertical edge as the reference.
Model not specified: Varies by period. Proposed historical date; an existing documentary source is linked but was not consulted for this date in this session. Do not interpret this reference as the manufacturing date of the illustrated specimen. Generic playing die; this object exists in many forms and across different periods. A universal year would be misleading.