Just check out my .sig for a Wild Elf graphic...
the REAL answer to your question is:
They look however YOU want them to look.
I tend to think of them ala Tolkien, but the pictures and animated films have them as beautiful childlike-creatures...
in my writings, they tend to be more feral...
like my .sig
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The RudeDawg
Known in these Forgotten Realms as Perin LightEyes