(a) Fruits shall be fairly uniform in size and shall be packed in containers according to approved and recognized methods.

(b) “Fairly uniform in size” means that not more than 10 percent of the grapefruit per sample may vary more than one-half inch in diameter.

(c) In order to allow for variations incident to proper sizing, not more than 10 percent of the samples in any lot may fail to meet the requirements of size.