recent internet packet size samples

I'm interested in seeing the distribution of packet sizes across a 1500-byte-constrained measurement point, with "real internet traffic" going past (for some reasonable interpretation of that phrase). Specifically, I'm looking for the number of IP datagrams of size M for all M encountered throughout a long, contiguous packet stream (say a few hours' worth around the residential surfing busy hour). I can do measurements myself, but I'd prefer not to reinvent the wheel. Could anybody point me at some recent data? Thanks, Joe