We weren't sure how big the portions were, and we were debating on whether we should order a small or a large. So we asked our pleasant waitress, "What's the difference between the small and the large?"Her answer: "The size."
Uh yeah, thanks.
An interesting side note: One of the condiments you can add to your Pho is spicy chili. Do yourself a favor: Don't spill a bunch of it on the table, try to clean it up, then later wipe your nose with fingers that likely have chili remnants on them. Your nostrils will be on fire for the duration of your meal, and beyond. Kind of like mine are right now.