| N˚ | Length (mm) | Wide (mm) | Thickness (mm) | Weight (gr) |
| Mean | 6.82 | 5.40 | 1.890 | 0.0789 |
| δ | 0.079 | 0.061 | 0.266 | 0.005 |
| N˚ samples | 50 | 50 | 50 | 50 |