nibWindowSize is a lightweight (4kb) addon to adjust the size of the in-game windows (SpellBook, Character, Trade, Auction House, etc).
I often find myself running at low UI scales, unfortunately this makes the in-game windows small and hard to read. So I made this little addon to bring them back up to size It can also work the other way, and make windows smaller.
All options can be adjusted at the top of Config.lua
After changing settings, type: /reload ui