I'm kind of leaning toward Mini Lop, though sometimes it can be hard to be sure. The Holland Lop is one of the breeds that employs the dwarfing gene to get the really typey, tiny animal described in the breed standard. Since the dwarfing gene is lethal if the rabbit inherits it from both parents, you can't breed true for it, and you will always get some rabbits that don't inherit the dwarfing gene and grow a little larger. We often call those animals "false dwarfs." A false dwarf Holland can easily be the size of a smaller Mini Lop.
This is a false dwarf Holland that I had.

As Hollands go, she was enormous, weighing over 5 lbs. A friend of mine teased me about her - "are you sure that thing isn't a Mini Lop?" - but both of her parents were pedigreed Hollands. She was a real sweetheart; wound up with of all things, a career as a TV star.
This is a false dwarf Holland that I had.
As Hollands go, she was enormous, weighing over 5 lbs. A friend of mine teased me about her - "are you sure that thing isn't a Mini Lop?" - but both of her parents were pedigreed Hollands. She was a real sweetheart; wound up with of all things, a career as a TV star.