This software allows simple sorting of iPhoto images based on their size.
Thankfully, there is a solution - iPhotos By Size. This AppleScript Studio application was created in XCode and is available for download as a .zip file. Once the archive is expanded (simply double-click), just drop it into your Applications Folder and the installation will be complete. However, since this is AppleScript-based, you'll need to be patient; for large libraries, the analysis process may take a while. You might even consider making a sandwich while you wait.
Overall, iPhotos By Size is a great addition to iPhoto, providing you with the ability to sort images according to file size - helping you better manage your digital images.
Version 1.0: N/A