Perhaps this can help you in picking the correct wick,
Yes, good info there, I have the two sizes they recommend in the cotton braid ordered, they will be included in the test samples Candlewic is sending me, all beeswax is a little different but I should be able to match up the wicks,
I guess if I had the correct wick size and they were actually burning completely, there should be no running?
Well, you have experienced both to big and too small wick diameter, the way the hemp cord is put together will not be able to curl as it burns creating a constant length of wick for the balance of fuel to candle stick diameter, beeswax is known for not dripping, if all of the components are in balance, the candle is level and it is out of the wind. If you are burning the candle in a dish or candle tin that captures the running wax, it's OK. It works and the flame doesn't run away, a flame less than an inch is good.
For me the tea light is a new problem and does not follow the diameter, wick, fuel physics that I have become accustomed to, in this type of candle all the wax melts and feeds the wick like a liquid fuel lantern. mckrob's link is the first reference I've seen that covers wicks for tea lights using beeswax. I used the wick selector at the candle supply I mentioned above and it gave me a wrong solution.
I know it would be a lot easier to just buy the things but it just ain't fun that way for me

I don't know what these candles cost but it looks like .32 per with the $6.00/ lbs and .23 with the local wax some where around $3.00/ lbs.