[moehoward]

"And - LORD - she was big. Much bigger than the stock photos you posted. She probably added 40 pounds."

Fat suit-wearing January Jones returns to 'Mad Men' in a really big way.

[Responsibility2nd]

OK, I clicked the link, thinking they must have used a body double. And they did,

"Because January Jones is so slender to begin with, and didn't pack on that much weight, the show apparently had to resort to some of the makeup tricks they used on Elisabeth Moss during Peggy's pregnancy late in season 1, plus a non-pregnant body double for the bath scene," he continued.