I'm watching an Eve Bolt livestream on YouTube while I put together a palette, and I realized she's creating 12-color sets for the Roman Szmal Urban Mini palettes - which seem to hold 12 colors. Unless you get creative, lol.
I wanted to share quickly to the Eve Bolt community (it's a Discord) how I manage to squish 20 colors into my Urban Mini palette, so I made a quick video and uploaded it to YouTube.
Other folks into #watercolor may dig this too: