If you’re like me, I’m not always sure what is the best bead to use on a hook. When I started tying flies, I used to guess which bead to use. Then I purchased fly tying books that included pattern sheets with the bead size in them. Sizes were 1/8″, 5/64″, 5/32″ etc. Next I had to get used to 1.5 mm, 2.0 mm, 3.0 mm. I still have a few packages that are Non-metric so I use this Bead Conversion Table as a quick reference guide.
I hope it helps you!
Bead Conversion Table
Metric Diameter | Inch Diameter | Hook Size |
1.5 mm | 1/16” | 18 – 22 |
2.0 mm | 5/64” | 16 – 20 |
2.3 mm or 2.4 mm | 3/32” | 14 – 18 |
2.6 mm or 2.8 | 7/64” | 12 – 16 |
3.0 mm or 3.2 | 1/8” | 10 – 14 |
4.0 mm | 5/32” | 8 – 12 |
4.5 mm | 3/16” | 6 – 10 |
5.0 mm | 1/4″ | 4 – 8 |