Sizes
Most countries, except the United States, use a metric system for describing nail sizes. A 50 x 3.0 indicates a nail 50 mm long (not including the head) and 3 mm in diameter. Lengths are rounded to the nearest millimetre.
For example, finishing nail* sizes typically available from German suppliers are:
| Length | Diameter |
| mm | mm |
| 20 | 1.2 |
| 25 | 1.4 |
| 30 | 1.6 |
| 35 | 1.6 |
| 35 | 1.8 |
| 40 | 2.0 |
| 45 | 2.2 |
| 50 | 2.2 |
| 55 | 2.2 |
| 55 | 2.5 |
| 60 | 2.5 |
| 60 | 2.8 |
| 65 | 2.8 |
| 65 | 3.1 |
| 70 | 3.1 |
| 80 | 3.1 |
| 80 | 3.4 |
| 90 | 3.4 |
| 100 | 3.8 |
| 90 | 3.8 |
| 100 | 4.2 |
| 110 | 4.2 |
| 120 | 4.2 |
| 130 | 4.6 |
| 140 | 5.5 |
| 160 | 5.5 |
| 180 | 6.0 |
| 210 | 7.0 |
- Drahtstift mit Senkkopf (Stahl, DIN 1151)
Read more about this topic: Nail (fastener)