She wore a frilly and almost diaphanous black dress that was a little undersize for her. It was not sleeveless but neither was it short sleeved. On the bottom part, the hem was shy of covering her knees.
She had black high heeled espadrilles. At least the colors matched but then again, they seemed too high for the dress.
Her whole style of dressing was not the best for the context. Her almost unkempt hair would have made you guess her profession had she not been standing in front of a class giving a presentation.
Given the context, if you ask me, in an undersized black dress and matching high heeled espadrilles, she was not quite presentable.