What the fuck is this shit?

Chances are, you know of the Reese's Peanut Butter Cup. It's widely hailed as the "greatest thing ever."
However, this halloween I thought they seemed a bit smaller. But I brushed it off, maybe I'm just crazy.
But just now I opened one and it was definitely bigger than the others. So what the fuck?
I google it and yes, they are smaller. For the same price. Screw Reese's, I'm making my own peanut butter cups.