Emphasizing Brightness:

* The full moon shone like a giant pearl in the night sky.

* The full moon shone like a silver dollar in the inky blackness.

* The full moon shone like a spotlight on the sleeping world.

Emphasizing Size:

* The full moon shone like a dinner plate hung in the heavens.

* The full moon shone like a giant eye watching over the land.

Emphasizing Impact:

* The full moon shone like a beacon guiding lost souls.

* The full moon shone like a whisper of magic on the world.

More Poetic:

* The full moon shone like a dream painted on the canvas of night.

* The full moon shone like a silent melody in the heart of the darkness.

You can choose the simile that best fits the tone and feeling you want to convey in your writing.