Honestly, at the moment I'm not sure of the ideal width. I've just ordered a Perlenpresse sugar skull brass press, so don't know the exact dimensions or the delicacy of the stringer needed to decorate the skulls themselves.

Most of it would be made into murrini anyway, as further skull decoration. I've made a couple of simple rose murrini already with full-width cane, but my torch is fairly small (GTT Scorpion) and a cane bundle a couple of inches in diameter takes an ungodly amount of time to heat up enough to pull it! I'm just looking to shorten the melt time by using thinner cane in the bundle.

LOL on the stringer pulling! I take glassblowing in the Fall at my local college and we spend an afternoon making our own cane/stringer/twisties. Its always a challenge to see how long we can get it before we lay it onto the paddles to cool. I'm not great at it when its that big, but some of my classmates have definitely come within striking distance of 90ft, well outside the doors of the hot shop and into the parking lot...

As far as I can tell, no one is doing them for sale - either stringer or murrini. If I get any good at it, I'll have to consider selling them myself ;-)