This is my face as I'm trying to find an X program that will show me some text in a given XFT font family and size, so I can see just how big it is. xterm will do fine for monospaced fonts, but if I want to see what 'Sans-11' actually looks like, apparently this is a bit non-obvious.
(Am I going to have to write this myself in Tcl/TK or Python/TK?)