U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
The size of onions may be specified in accordance with one of the following classifications.
| Size designation | Minimum diameter | Maximum diameter | ||
|---|---|---|---|---|
| Inches | Millimeters | Inches | Millimeters | |
| Small | 1 | 25.4 | 2
| 57.2 |
| Repacker/Prepacker 1 | 1
| 44.5 | 3 | 76.2 |
| Medium | 2 | 50.8 | 3
| 82.6 |
| Large or Jumbo | 3 | 76.2 | ( 2) | |
| Colossal | 3
| 95.3 | ( 2) | |
1 In addition to the sizes specified, a lot of onions designated as Repacker or Prepacker shall contain at least 60 percent or more 2 inches or larger in diameter.
2 No requirement.
