Technique is same as finding the bigger files, but the only difference the sort is ascending order.

# find . -type f -exec ls -s {} \; | sort -n | head -5

In the above command, most probably you will get to see only the ZERO byte files ( empty files ). So, you can use the following command to list the smaller files other than the ZERO byte files.

# find . -not -empty -type f -exec ls -s {} \; | sort -n | head