I have an interview coming up next week for a job as a research assistant. I was thinking of wearing a floral dress (which comes slightly above my knee), plain cardigan and black tights with flat shoes. This will cover all my tattoos whilst still looking nice and slightly more standoutish than the normal white blouse and smart pants/skirt look but now I am thinking maybe an above the knee dress might be too casual. Thoughts? I have a below the knee dress I could wear which is quite smart but not as nice or I could buy something new. I haven't had an interview in 9 years and back then I just went with a suit and shirt so this is all new to me.