>>7008990I know you can set specific windows to floating, but I'm not sure if you can set a specific size. For stuff like URxvt, it handles it's size and position independently, so that should be easy enough to figure out. All the configuration is done in the config.h file, which seems a little confusing at first but is actually really nice to use, as it provides tons of examples and can be utilized much more than an ordinary config file.
There are also a ton of patches available on the suckless website, I use the pango patch for better fonts and pertag to make windows open in the same workspace every time.