These ears aren't difficult. I did have to make a pattern which I've included at the bottom.
Here I'm tracing 4 inside ears instead of 2. I've done this because the felt I'm using is thin so I'll double it.
The bunny was about 13" tall. The length of this ear is 3 3/4" and it's on a 5" x 7" background. Click the picture to download to your desktop.