My rule of thumb for average size of packets on the Internet is 576 bytes. I can’t exactly remember where I got that number from and have always wanted some confirmation that it is a reasonable estimate for the average packet size. And Slaptijack has some good raw data:
In this case, gentlemen, size matters.
Yesterday, I calculated the average packet size for one of the networks I work on using data from 263986M (263,986,000,000+) packets.
Average packet size for that sample was 557 bytes.”