What's the biggest rabbit? You guessed it, the Flemish Giant. I think the Giant name gave it away. lol I have seen maybe ten of them in the time I have spent caring for rabbits. I wasn't sure what it was when I first saw one either, as they are big. Most average around 15 pounds and can get up to 30 pounds or more. There are seven known colors that I know of; black, blueish, fawn, light gray, steel gray, sandy brown and white.
We don't have any for adoption at the moment, but we did have 2 of them here last year. They were both adopted as a pair. I was happy that happened. I was hoping someone would get them both at the same time.
I'm posting this picture to show how big they really are. This picture has not been photoshoped or anything like that. This is there real size. BIG! Oh, and they love LOTS of carrots. :)