and then some!

Let me guess. They're going as pepperoni pizza slices but their costumes are too small.

My second guess would have been they'd exploded out of most of their costumes of being planetoids covered in craters.

Rather neat outfit they came up with ^^ And that's prolly beyond family-sized X3

They're going as sexy pizza...

Because the sexy nurse, the sexy stewardess, the sexy pirate, the sexy referee, the sexy rollerskater, the sexy plumber, the sexy train conductor, the sexy papergirl, the sexy carpenter, the sexy auto mechanic, the sexy cable TV technician, the sexy taxi driver, the sexy explorer, the sexy detective, the sexy forensics examiner, the sexy judge, the sexy fast food worker, the sexy cop, the sexy Border Patrol agent, the sexy Robin Hood, the sexy persecuted witch, the sexy mental patient, the sexy teddy bear, and the sexy bee were already taken.

Weird enough, they had several Sexy Blobs in stock, although they were all size six an under.
Oh the irony.

You watch too much Jon Stewart don't you?