Once upon a time, NASA and JPL would themselves take up the task of adding scale to rover images, by adding in a correctly scaled model of the vehicle to actual photographs:

Now Opportunity compares to a golf cart in size, whereas Curiosity and Perseverance are nearer a car or van. The above image of Opportunity at Victoria Crater, a small break in the immense flatness of Meridiani Planum, would seem modest compared to a scaled model of Curiosity ascending Mt. Sharp. I wish I had the skills and time to do that kind of work...