A closed shoe, or ankle strap, when worn with a dress, ‘separates’ the foot from the rest of the leg. Closed shoes work best you are wearing long skirts or pants because you don’t see shape of the leg. Avoid a very thin heel if your legs are thin; your legs will only look thinner. A shaped heel, also known as a lavatory heel, will give your leg shape. If you have no calf, a sling back will create the illusion of shape. The right option is therefore the perfect choice!
The answer to this fashion Q&A was provided by Chata Romano