Benecchi Tying Thread is an excellent tying thread in all the right colors for all types of flies.

It is available in 3 thicknesses: 8/0, 10/0 and 12/0. 8/0 is the thickest and 12/0 is the thinnest.

12/0 is excellent for dry flies, nymphs, wet flies, etc.

10/0 is a really nice all-round thickness for most things.

8/0 is also a fine all-round thread, but has a little more strength than 10/0.

Not all colors are available in all thicknesses.