This is a really great simple way to find files on the filesystem that are over 200k in size.

find /path/to/directory/ -type f -size +200k -exec ls -lh {} \; | awk '{ print $NF ": " $5 }'

You can use the output of this to either store in a file, or pipe to wc for a count of lines

find /path/to/directory/ -type f -size +200k -exec ls -lh {} \; | awk '{ print $NF ": " $5 }' | wc -l

You can also use egrep before wc to look for specific filetypes

find /path/to/directory/ -type f -size +200k -exec ls -lh {} \; | awk '{ print $NF ": " $5 }' | egrep '(jpg|bmp|gif|tiff|jpeg)' | wc -l