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The
chart below is to assist you in converting from the old Ligne
system of crystal measurement to metric millimeters.
Ligne to Metric
| Ligne | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 0/16 | 33.8 | 36.1 | 38.3 | 40.6 | 42.9 | 45.1 | 47.4 |
| 1/16 | 34.0 | 36.2 | 38.5 | 40.7 | 43.0 | 45.3 | 47.5 |
| 2/16 | 34.1 | 36.4 | 38.6 | 40.9 | 43.1 | 45.4 | 47.7 |
| 3/16 | 34.3 | 36.5 | 38.8 | 41.0 | 43.3 | 45.5 | 47.8 |
| 4/16 | 34.4 | 36.7 | 38.9 | 41.2 | 43.4 | 45.7 | 47.9 |
| 5/16 | 34.5 | 36.8 | 39.1 | 41.3 | 43.6 | 45.8 | 48.1 |
| 6/16 | 34.7 | 36.9 | 39.2 | 41.5 | 43.7 | 46.0 | 48.2 |
| 7/16 | 34.8 | 37.1 | 39.3 | 41.6 | 43.8 | 46.1 | 48.4 |
| 8/16 | 35.0 | 37.2 | 39.5 | 41.7 | 44.0 | 46.2 | 48.5 |
| 9/16 | 35.1 | 37.4 | 39.6 | 41.9 | 44.1 | 46.4 | 48.6 |
| 10/16 | 35.2 | 37.5 | 39.8 | 42.0 | 44.3 | 46.5 | 48.8 |
| 11/16 | 35.4 | 37.6 | 39.9 | 42.2 | 44.4 | 46.7 | 48.9 |
| 12/16 | 35.5 | 37.8 | 40.0 | 42.3 | 44.6 | 46.8 | 49.1 |
| 13/16 | 35.7 | 37.9 | 40.2 | 42.4 | 44.7 | 46.9 | 49.2 |
| 14/16 | 35.8 | 38.1 | 40.3 | 42.6 | 44.8 | 47.1 | 49.3 |
| 15/16 | 36.0 | 38.2 | 40.5 | 42.7 | 45.0 | 47.2 | 49.5 |
Simply find the Ligne size from the top
of the chart and the fraction from the left
then follow both values as shown below to find the metric equivalent.
White's Crystals
PO Box 460532
San Francisco, CA 94146