Tools
There are many programs available online to help resize your images. One such tool is https://picresize.com/.
Profile Photos
Must be no smaller than 450 by 450 pixels and no larger than 2048 by 2048 pixels. Images must also be less than 10MB is file size.
Business Listing Photos
Must be no smaller than 500 by 350 pixels and less than 10MB each.
To learn more about photo best practices and how to showcase your business click here.