To get the bigger plate, you have to get the bigger burger - that was the medium burger (1/2-pound) - that pic is deceptive, too. There was a huge load of fries under there, easily enough for two, or even three, people.
This is the small burger, it comes in a basket:
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The large burger is a full pound, with a commensurate amount of fries. A few usually come out of the kitchen while we’re sitting there, and I love how huge they are, but I’d never get one. I always get the small one. I’ve eaten the medium one before, but I was younger then and could handle it. Not so much now. I’d likely get up from the table and collapse.