iPhones never had a straightforward interface to check the file size of pictures on your device. Users have had to use third party gallery apps, or upload their images to Google Photos or something similar to be able to check the file size. However, there’s actually a much easier way to check file sizes of photos, and you won’t even have to leave the Photos app to use it. We’ll accomplish this using Shortcuts, so follow along as we build the Siri Shortcut for this purpose.
Install the Shortcuts app (Free) from the App Store. As I mentioned earlier, you can safely skip this step if you’re using either the developer beta or public beta of iOS 13.
Now that you have created a shortcut, you need to set an action for it. For doing so, tap on the “Add Action” button that appears when you open the shortcut and type “Get details of files” in the search box.