7 CFR §51.1349
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Size may be specified in connection with a grade by agreement between buyer and seller and stated in terms of minimum diameter or minimum and maximum diameters. Diameters shall be specified in inches and not less than eighth-inch fractions thereof. In addition, size may be stated in terms of ratio of length to diameter.