Anyway, I've scoured the internet looking for clues to just why this one is that much bigger - but nothing.
All I know is that the dirham was introduced in 1973, and that the term "dirham" is indirectly from the Greek Drachma by way of the Ptolemaic Empire and the Sassanid Empire.
But I can't find anything about the U.A.E. changing the size of the coins.
Oh well. Hey, does anyone else think that it's kind of cool that even though the Drachma has been replaced by the Euro, its name kind of lives on?