Elves are beautiful human-like creatures. Much like J.R.R Tolkien's elves in the Lord of the Rings series. (Although still not quite exactly like they were originally created) J.R.R Tolkien's elves are the closest thing to the original I can reference, Santa's little helpers elves being the furthest from their true nature. Elves are described as light skinned, fine boned, with with silken hair and large eyes.
Aelfsciene, an adjective in Anglo-Saxon, means 'Pretty as an elf'. Quite the high compliment considering how beautiful elves are said to be.