(I am mopping by our slushie machines when a man approaches me with an empty cup.)

Customer: *holds up our biggest cup size* “Is this a medium?”

Me: “No, that’s an extra-large. This one is the medium.” *shows him medium cup*

Customer: “Oh.”

(The man pulls out a large, which is clearly larger than the medium.)

Customer: “So, is this a small?”

Related:
Size Matters, Part 2
Size Matters