How do i create a Library Search filter for pixel dimensions?

The Smart Collection that Srishti described is basically the same as a saved search on the macOS Finder or Windows Explorer desktop, so if you’ve used those, you’ll already know how to use a Smart Collection. As in macOS/Windows, it updates automatically depending on which current files match the criteria.

The next time you want to use the Smart Collection you created, you’ll find it in the Collections panel.

Hi ​@Ellis_Vener 

Yes, you can filter by pixel dimensions in Lightroom Classic, but not directly through the Library Filter bar. Instead, create a Smart Collection:

1. Go to Library > New Smart Collection.

2. Set the rule to File Dimensions.

3. Choose a condition such as is less than or is greater than, and enter the maximum pixel dimensions you're looking for (for example, 2048 × 2048 px).

4. Save the Smart Collection, and Lightroom Classic will automatically include all matching photos.
    

   

    

If you're looking to find files by file size (MB/KB), Lightroom Classic doesn't provide a built-in search filter or Smart Collection criterion for file size.