It is not as simple as that. I added support for width up to 16, but it is not too well tested.
You can use it from
here. The package includes a 10x20 font.
Another (not well tested) feature is support for non-latin characters input. This uses and extra modifier for language characters, configured to be the Sym key by default. The configuration keys LangSymbols and LangSymbols16 define the input of keys pressed with this modifier in 8 bit and 16 bit (UTF8) modes.
Source.