Theory #7: Size Matters
A lot of people have been talking about how the Face is too small to be a suit. What a lot of people are not talking about is how almost every suit (except Acephalous) is too small to fit a person. Even Photo-Negative Minnie, the second tallest of the suits, is only about a foot taller than your desk (assuming your desk is approximately 3 feet tall). How is a grown man supposed to fit in a suit that is shorter than a 10-year old?
This means that either A. they were produced that way, or B. they shrunk whilst on the island. Seeing how option is A is somewhat unlikely, as they would have just been thrown out before leaving the factory, option B is what we are left with. However, that begs the question:
How did they shrink?