Answer:
I presume you are talking about a simple necklace strand. This is not the best thread for that purpose. This thread is meant primarily for using with seed beads, i.e. weaving small beads in a pattern. It is too thin for a simple stringing of a 8mm crystals - it is meant to go through seed beads more than once as you weave.
Search the site for "Beading Wire" (and not Artistic or craft wire). A .018" 7-strand spool should be sufficient, and perhaps look for a color to match the crystals. The 19-strand or 49-stand will give you more drape, if that is what you want. The .018" thickness is a good average size - a smaller size may be too loose and a larger size may be too thick for the bead hole.
Gender: Female
Age: 45 to 54
Level of Expertise: Intermediate