How about a maxi?

this blue jean denim maxi shirt dress with chest pockets looks knee-length...

but from this picture it's quite evident that on the average height woman it is at least calf-length if not longer...

yup, at 51" it's a tall, cool drink...

and it could possibly look as cool as this...

it's a little bit different, more fitted but then she's like a size 2...