Limit Image Upload Size and Dimensions

Yes. Set a maximum width and height in pixels, and images larger than that are blocked before they're added to your media library.

The limits apply to everyone who uploads, so a shared or multi-author library stays under control without you policing files by hand.

It depends on your layout, but most sites rarely need images over a couple of MB or wider than about 2500 pixels. Set limits that match how large your images actually display.

No. That is a server ceiling that produces a confusing failure when it is hit. This is a WordPress-level rule you control from the dashboard, with a clear message explaining why the file was refused. Your server limit still applies on top.

The upload is rejected at the point of upload with a message stating the limit, so they know immediately to resize or re-export rather than wondering why the image never appeared.

No. The limits are site-wide, which is usually what you want on a shared or multi-author library - one rule everybody follows, including you.

Raise the limit, upload the file, and set it back. The setting is a single field, so making a deliberate exception takes a few seconds.