[xmonad] Workspace selector font size

Hi, [ My xmonad config is *extremely* idiosyncratic, and I haven't touched it for literally years. So I'm struggling to track down the documentation which might be relevant to my problem: I don't remember the XMonad ecosystem terminology, and my configuration looks nothing like the standard ones. All this to say that the way I choose to state my question might sound a bit odd. I hope it makes sense. ] My workspase switching key opens a grey bar at the bottom of the screen. Since switching to 0.17, the fonts on this have become enormous and the virtual screen names (of which I have many) don't fit in the bar any more. Can you give me any pointers on where this font (or the appearance of this bar in general) might be configured?