Would anyone happen to know or have reference material giving the average size of packet sizes transmitted during game play?

I'm looking to run some tests on my network by sending dummy messages. I think it would be best if the the size of the messages where equivalent to messages used in action based games.

A turn based strategy game can send a dozen kilobytes per packet.

A one-on-one first person shooter deathmatch style game can send a dozen bytes per packet.