>Photon is tiny, quantum effects
>Electron is tiny, quantum effects
>Atom is tiny, quantum effects
>Molecule is already pushing it, quantum effects, but starting to push it
>LITERAL FUCKING MAGIC HAPPENS HERE
>ops sorry bucko too big for quantum effects now.

Now, I know, "decoherence", "collapsing wavefunction", whatever the fuck. How big is the biggest you get before this transition between those two regimes happen, and why isn't there an experiment demonstrating this clearly? How many atoms can something have before it begins behaving exclusively classically?
EXPLAIN THIS RIGHT NOW