Elixir language icon: but there is a sizing problem.

I'm issuing this as a pull request, even though I don't think it should be accepted as it is, because of a sizing issue. My icon is considerably smaller than the others.

I've added an icon for the [Elixir language](http://elixir-lang.org).
I've got a reasonable SVG single-color icon that I've done in Illustrator.

But, I'm a bit lost about how to get the correct sizing, though? What tools did you use to prepare the font?

I'm happy to write up documentation on the process, but it would be good to get a starting point.

Also, what did you use to convert the SVG into the EOT/WOFF/TTF files?

Thanks in advance.