| ROUND |
 |
 |
| Ø External |
Ø Internal |
| cm. 16 |
cm. 10.60 |
| 18 |
13.20 |
| 20 |
14.90 |
| 23 |
15.20 |
| 25 |
17.50 |
| 28 |
20.10 |
| 30 |
22.50 |
| 32 |
24.30 |
| 35 |
26.90 |
| 38 |
27.50 |
| 40 |
30.20 |
| 42 |
31.90 |
| 45 |
34.30 |
| 50 |
40.40 |
| 55 |
45.50 |
| 60 |
50.40 |
|
| RECTANGULAR |
 |
| Dimensions cm. |
| 15x20 |
20x30 |
| 15x25 |
20x35 |
| 15x30 |
20x40 |
| 15x35 |
20x45 |
| 15x40 |
25x35 |
| 18x30 |
25x40 |
| 18x35 |
30x40 |
| 18x45 |
35x45 |
| 40x50 |
 |
| Band height cm.3 from every side |
|