My best guess is no more than possibly 4 or 5 inches. But then again, it's hard to tell.
There are many rabbits with ears sticking up. My Netherland dwarf rabbit, which is the smallest rabbit, has upright ears. Also dutch rabbits and rex rabbits do, to name some. Hope this is of some help :)
exactly 11 inches long
2 feet=24 inches
I think the biggest one can be 5 inches long.
4 inches
1000 inches
100 Inches
A Ratel is about 25 inches long.
12 inches
That is approximately 3.4 inches
84 inches