| Name | Description |
|---|---|
| 11 classes | geometric progression | p = 2 | starting at 46.08e-3 m | according to Kerstig (1986) | |
| 5 classes | geometric progression | p = 3 | starting at 6.6e-3 m | according to Steinmetz (1991) | |
| Particle sizes by geometric progression according to Austin et al. (1971) | |
| Default | 21 classes | geometric progression | p = sqrt(2) | |