[Code of Federal Regulations] [Title 33, Volume 2] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR174.25] [Page 810] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 174--STATE NUMBERING AND CASUALTY REPORTING SYSTEMS--Table of Contents Subpart B--Numbering System Requirements Sec. 174.25 Size of certificate of number. Each certificate of number must be approximately 2\1/2\ by 3\1/2\ inches.