Shape/Appearance:
* As delicate as butterfly wings.
* Like two small seashells.
* Shaped like a crescent moon.
* As smooth as polished marble.
Function:
* Like a radar dish, picking up every sound.
* Like a microphone, capturing whispers and shouts.
* As sensitive as a tuning fork.
* As eager to listen as a thirsty plant to rain.
Feeling:
* As hot as burning coals when I'm embarrassed.
* As cold as ice when I'm scared.
* As itchy as a mosquito bite.
* As heavy as lead when I'm tired.
Other:
* Ears that stick out like a pair of antennas.
* Ears that are as long as a donkey's.
Remember to choose the simile that best fits the context of your writing.