The Bluestreak Crystals size guide for Preciosa Seed Beads can be found below:
| SIZE | SIZE (mm) | SIZE TOLERANCE (mm) | MINIMUM DIAMETER OF HOLE (mm) | APPROX pcs/kg | APPROX pcs/kg | |
| TRANSPARENT COLOURS | OPAQUE COLOURS | |||||
| 15/0 | 1.5 | 1.4 - 1.5 | 0.40 | 0.40 | 625 000 | 283 500 |
| 14/0 | 1.6 | 1.5 - 1.6 | 0.40 | 0.40 | 325 000 | 147 420 |
| 13/0 | 1.7 | 1.6 - 1.8 | 0.50 | 0.40 | 291 000 | 131 998 |
| 12/0 | 1.9 | 1.8 - 2.0 | 0.60 | 0.50 | 165 000 | 74 844 |
| 11/0 | 2.1 | 2.0 - 2.2 | 0.70 | 0.60 | 130 000 | 58 968 |
| 10/0 | 2.3 | 2.2 - 2.4 | 0.80 | 0.70 | 91 000 | 41 278 |
| 9/0 | 2.6 | 2.4 - 2.8 | 0.90 | 0.80 | 68 000 | 30 845 |
| 8/0 | 2.9 | 2.8 - 3.2 | 0.90 | 0.80 | 42 000 | 19 051 |
| 7/0 | 3.5 | 3.2 - 3.7 | 1.00 | 0.90 | 21 100 | 9 571 |
| 6/0 | 4.1 | 3.7 - 4.3 | 1.10 | 1.00 | 13 300 | 6 033 |
| 5/0 | 4.6 | 4.3 - 4.8 | 1.20 | 1.10 | 12 100 | 5 489 |
| 4/0 | 5.1 | 4.8 - 5.3 | 1.30 | 1.20 | 7 400 | 3 357 |
| 3/0 | 5.6 | 5.3 - 5.8 | 1.40 | 1.30 | 5 300 | 2 404 |
| 2/0 | 6.1 | 5.8 - 6.3 | 1.60 | 1.60 | 4 800 | 2 177 |
| 1/0 | 6.6 | 6.3 - 6.8 | 2.00 | 2.00 | 3 800 | 1 724 |