Setting Fixed Image Widths for Clients for Easy Image Upload in the Editor

I’m trying to make image uploads as easy as possible for clients in the editor so that they can upload the images they want that also fit the design I have created.

For example, I want to have an image that is a perfect square. Normally I would crop it & then upload it in, but for some clients that might be too confusing.

Is there any way to set fixed dimensions for a square image in the designer so that when a client logs into the editor & uploads an image it will maintain the dimensions I set no matter what dimensions the image they uploaded in the editor is?

This way, no matter what size image they upload in the editor, it will fit the size I have made in the designer.