I suggest you go back and reread the book (and be more polite -- this is my board and I do not tolerate rudeness here).

Here is Frodo's description from "Strider":

  "'A stout little fellow with red cheeks,' said Mr
  Butturbur solemnly.  Pippin chuckled, but Sam looked indignant. 
  'That won't help you much; it goes for most hobbits, Barley,
  he says to me,' continued Mr Butturbur with a glance at
  Pippin.  'But this one is taller than some and fairer
  than most, and he has a cleft in his chin: perky chap with
  a bright eye....'"

Of course, Butturbur had also been told to look for a hobbit travelling as Mr. Underhill, and leaving the Shire. So Frodo would not have stood from other hobbits physically as much as you believe if Gandalf needed to give Butturbur that much information.

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Parma Endorion: Essays On Middle-earth, Revised Edition