Without magic altering her hair, it lost its frizziness and ran a few inches further down her back.  Instead of persistent curls (which Hermione thought was her magic manifesting in her hair), she had soft waves, or as soft as they could be after a year of neglect and damage, and the coloring was a shade or two lighter.  The biggest change, though, were her eyes now showing their true hazel-tinged blue tone.  They were distinctive enough that when she was sixteen,  17  magazine did a specific article on eyeshadow for eyes like hers, as well as several other unique shades.  She only knew about it because her sister had been so excited about Hermione being featured in a magazine.  Hermione didn’t really care much herself, but at least it was a flattering article (compared to a certain persistent "journalist").