grommet measurement of eyelet and grommet size by internal diameter
American
| Size |
Internal Diameter |
| 00 |
3/16″ |
0.188″ |
≈4.76 mm |
| 0 |
1/4″ |
0.250″ |
≈6.35 mm |
| 1 |
9/32″ |
0.281″ |
≈7.14 mm |
| 2 |
3/8″ |
0.375″ |
≈9.52 mm |
| 3 |
7/16″ |
0.438″ |
≈11.11 mm |
| 4 |
1/2″ |
0.500″ |
≈12.70 mm |
| 5 |
5/8″ |
0.625″ |
≈15.88 mm |
| 6 |
13/16″ |
0.813″ |
≈20.64 mm |
Italian
| Size |
AKA |
Internal Diameter |
Depth |
Hole Diameter |
| 058 |
100, 608 |
|
|
2.5mm |
| 054 |
100, 608 |
4.5mm |
3.5mm |
3mm |
| 053 |
110 |
|
|
3mm |
| 052 |
120, 408 |
|
|
3.5mm |
| 051 |
130, 308 |
5.5mm |
4.7mm |
4mm |
| 050 |
140, 208 |
6.7mm |
5.0mm |
5mm |
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