Project size

Remarks elsewhere about lines and source files set me wondering about the the size of development projects. The poster mentioned 5000 lines in 20 files, which didn't seem so big, but I wasn't sure, so I did some stats for my current work project (Java back end, web front end). So far we have 58172 lines in 514 files, which seems to me pretty huge for two and a half of us to have produced. Now I know why I sometimes lose track of how things fit together.

Any comments on this? What seems like a big project to you? Does project size make a difference to the quality of the end result? How big is too big?

[At a cygwin bash prompt, I ran find . -name *.java -exec cat '{}' \; | wc -l and find . -name *.java | wc -l with variations to do the counting.]