A WordPress plugin that limits uploaded images to 5MB filesize
This plugin checks the upload file type and if it's an image, rejects it if it's larger than 5MB. Documents and other non-image media larger than 5MB are allowed.
The plugin also adds text to the message on the Media Gallery upload screen "Maximum upload file size: 100 MB. Image uploads restricted to 5 MB."
This plugin works both on the Media Library upload page and if the user uploads an image directly to a block.
The 5MB size is hardcoded.