If you're tall, where do you buy knee length dresses?

[InsufficientMum]

5'10ish. I'd like a dress for the summer to cover my knees, but not as long as mid-calf which doesn't suit me. Where should I look?

I have no idea, but following for ideas!

Long Tall Sally.

Dorothy Perkins is good, but has got much more expensive recently.

Next tall range