CatIQ Hail Scale (CHS)
| CHS Rating | Imperial (in) | Metric (cm) | Comparison |
| 0 | 0.25 | 0.7 | Pea or Smaller |
| 1 | 0.5 | 1.2 | Marble/Mothball |
| 2 | 0.75 | 1.8 | Dime/Penny |
| 3 | 0.88 | 2.1 | Nickel |
| 4 | 1 | 2.4 | Quarter |
| 5 | 1.125 | 2.6 | Loonie |
| 6 | 1.1875 | 2.8 | Toonie |
| 7 | 1.25 | 3.2 | Half-Dollar |
| 8 | 1.5 | 3.8 | Ping Pong Ball, Walnut |
| 9 | 1.75 | 4.5 | Golf Ball |
| 10 | 2.125 | 5.4 | Billiard Ball |
| 11 | 2.5 | 6.4 | Tennis Ball |
| 12 | 2.75 | 7 | Baseball |
| 13 | 4 | 10 | Grapefruit |
| 14 | 4.5 | 11.5 | Softball |
| 15 | >4.5 | >11.5 | Larger than Softball |