| Attribute number | Description |
| 1 | clump thickness |
| 2 | uniformity of cell size |
| 3 | uniformity of cell shape |
| 4 | marginal adhesion |
| 5 | size |
| 6 | bare nuclei |
| 7 | bland chromatin |
| 8 | normal nucleoli |
| 9 | mitoses |