| Code | Definition | Number of Accessions |
| 1 | very small 14 - two-rowed <30 - six-rowed | 10 |
| 2 | 14-16 - two-rowed 30-35 - six-rowed | 30 |
| 3 | small 17-19 - two-rowed 36-40 - six-roved | 126 |
| 4 | 20-22 - two-rowed 41-45 - six-rowed | 198 |
| 5 | medium 23-25 - two-rowed 46-50 - six-rowed | 228 |
| 6 | 26-28 - two-rowed 51-55 - six-rowed | 159 |
| 7 | large 29-30 - two-rowed 56-60 - six-rowed | 49 |
| 8 | 31-32 - two-rowed 61-65 - six-rowed | 12 |
| 9 | very large >32 - two-rowed >65 - six-rowed | 3 |