Well, having been very bored at work, I discovered the following:
In the strip at the begining of the Redcaps and royals story arc, Quintyn sends a telegram home, the clerk tells him it's "1 silver bead for 40 characters."
Quin's message, counting spaces and addess line is 133 characters and our beloved Questor requested a "Silver Ring's worth" So, assuming the spaces between the words and the address lines all count that's 3 1/3 beads to the ring.
You can find that strip here:
Fear is your body's way of telling you you're being very stupid.