7 CFR 51.2952 – Size specifications
Size shall be specified in accordance with the facts in terms of one of the following classifications:
(a) Mammoth size. Mammoth size means walnuts of which not over 12 percent, by count, pass through a round opening
(b) Jumbo size. Jumbo size means walnuts of which not over 12 percent, by count, pass through a round opening
(c) Large size. Large size means walnuts of which not over 12 percent, by count, pass through a round opening
(d) Medium size. Medium size means walnuts of which at least 88 percent, by count, pass through a round opening
(e) Standard size. Standard size means walnuts of which not over 12 percent, by count, pass through a round opening
(f) Baby size. Baby size means walnuts of which at least 88 percent, by count, pass through a round opening
(g) Minimum diameter, or minimum and maximum diameter. In lieu of one of the foregoing classifications, size of walnuts may be specified in terms of minimum diameter, or minimum and maximum diameter: Provided, That not more than 12 percent, by count, pass through a round hole of the specified minimum diameter, and at least 88 percent, by count, pass through a round hole of any specified maximum diameter.