While recently converting a 38,000+ file project over to Git, I realized that there were some very large database backups sprinkled throughout the directory structure. Since I did not want these committed to the Git repository, I needed an easy way to locate them.
I was able to find any files over 50 MB (which is when GitHub starts warning you about file size) by using the following command:
find . -size +50M -exec ls -lh {} \+The -size argument allows various size increments, such as:
k for Kilobytes (ex: +3000k)
M for Megabytes (ex: +50M)
G for Gigabytes (ex: +2G)
On a small side-note, there is a good explanation of why it uses \+ instead of \; here: http://stackoverflow.com/a/6085237/54727