# Wire through a hole - diameter question

I'm trying to find a silver chain that can be used for a small bead with a small hole. Obviously, the chain needs to be thin enough to fit through the hole, but I can't measure the hole inside the bead by hand.

I found a chain that is 0.9mm in diameter, but I'm not sure the bead will fit. So I went home and threaded the bead with a 0.3mm wire that I have. It fit through 5 times. So basically, I have a bead strung up on 5 0.3mm wires. With this information, how can I figure out the diameter of the hole, or at least if it is greater than 0.9mm?

TIA

I'm trying to find a silver chain that can be used for a small bead with a small hole. Obviously, the chain needs to be thin enough to fit through the hole, but I can't measure the hole inside the bead by hand.

I found a chain that is 0.9mm in diameter, but I'm not sure the bead will fit. So I went home and threaded the bead with a 0.3mm wire that I have. It fit through 5 times. So basically, I have a bead strung up on 5 0.3mm wires. With this information, how can I figure out the diameter of the hole, or at least if it is greater than 0.9mm?

TIA
http://mathworld.wolfram.com/CirclePacking.html

From the case of five circles packed into one larger circle on this page, you can see that with optimal packing, the diameter of the larger circle is about 2.7 times that of the smaller circles. This means that in your case, if 0.3mm is the diameter of your thinner wire, the chain with 0.9mm diameter may not fit.

haruspex