The United States Small Business Administration (SBA) is modifying 47 small business size standards for industries in North American Industry Classification System (NAICS) Sector 44-45, Retail Trade, and retaining the current standards for the remaining industries in the Sector. In this final rule, SBA is increasing 46 of the size standards and converting the measure of size for one industry (NAICS 441110, New Car Dealers) from annual receipts to number of employees. As part of its ongoing initiative to review all size standards, SBA has evaluated every industry in NAICS Sector 44-45 to determine whether the existing size standards should be retained or revised. This rule also modifies SBA's Small Business Size Regulations to clarify that an NAICS code that represents a Wholesale Trade (NAICS Sector 42) or Retail Trade (NAICS Sector 44-45) Industry shall not be used for the Federal government's procurement of supplies.