What size registration marks would an Experimental "exhibition" aircraft registered in 1994 have?

For an Experimental "exhibition" aircraft registered in 1994, the correct size for registration marks is 2 inches. According to the Federal Aviation Administration (FAA) regulations, specifically under Title 14 of the Code of Federal Regulations (CFR) § 45.29, experimental aircraft are required to display registration marks that are at least 2 inches high. This requirement is in place to ensure visibility and readability while maintaining a standard that distinguishes experimental aircraft from standard civil aircraft.

Larger sizes such as 3-inch, 4-inch, or 12-inch marks are not specified for experimental exhibition aircraft, and indicating that 2 inches is the minimum requirement provides the essential context for the specifications laid out by the FAA. Therefore, the choice of 2-inch registration marks is aligned with regulatory requirements, confirming its correctness.