I used to be convinced this was a table for my doll house

You mean it isn't? It's good guy doll table, who's nice enough to keep the box lid off your pizza while it's being delivered. It's a promotional thing. "Free pizza with every doll table!"

Me too!!!

So what is it ?

^ it's there so the lid doesn't touch your pizza so the toppings don't come off.
But I used to think it was a table for my Barbies too

I always tried to balance all my food on it and imagined that I had a gigantic pizza slice ten times bigger than the table. I like balancing things.

The pizza looks swollen