95% of the butter in stores in are basically 4 east coast sticks stacked together 2x2. You can but “normal” sticks but it’s usually only fancier/organic/speciality stuff and 30ish% more expensive.
Most people just clumsily cut it into 4 equal east coast-ish sticks and store the remaining Tetris shape in the fridge.
I’ve not found a proper butter dish for large chunks we have.