REAL - The top image is going around Pinterest. I found it on a Catalog Website as an ad. It could easily be real. The next two are owned by Annette and are Roberto and Amy respectively. Both have held the largest rabbit in the world title. The next image shows Benny with his owner Sharon. The next two images are just more examples of verified large rabbits. One of the large breeds is the "Flemish Giant". If you've seen "Herman" he's real too. I included a link to Wikipedia.
That's a real big bunny."Benny joined Martin and Sharon Heather’s household last year when Martin came across the large bunny at an animal sanctuary. Although sanctuary staff warned that Benny didn’t really warm to people, Benny took an instant liking to Martin. With that, the Flemish Giant was welcomed into the Heather family."