It's not the size of the pie, it's how you use it.... Individual about 10" diameter ( 4 big slices) Medium is about12" Large I'm guessing 14-15".
They have both personal and large pizzas. A large had about 8 medium sized slices.
To be honest I was hung over and had soup and a beer. I believe they are personal size thought like CPK, but I may be completely wrong.
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