What is the minimum height requirement for the number displayed on a robot?

The minimum height requirement for the number displayed on a robot is 2.25 inches. This specification ensures that the team number is easily visible from a reasonable distance during matches, which is vital for referees, event staff, and other teams to identify robots quickly and accurately. A height of 2.25 inches is established to maintain visibility standards without being excessively large, which would create issues with space on the robot and hinder its design.

While other heights such as 1 inch, 2 inches, and 3 inches may be easier to consider, they do not meet the established requirement outlined in the rules. The choice of 2.25 inches strikes a balance between visibility and practicality within the competition constraints.