The ballet flat grew out of dancers' shoes: Rose Repetto opened her workshop near the Paris Opera in 1947 to make them. It keeps coming back because it solves a plain problem: a shoe you can walk in that still looks dressed. This autumn the conversation has moved to the heeled version. In an August 2026 roundup of the trend, Marie Claire pointed to a suede flat with a 1.5-inch block heel from Maryam Nassir Zadeh, which it reports Zoë Kravitz wearing in New York with a white T-shirt and flared jeans.
That detail is useful, because it shows what actually changes a ballet flat. It is not the label. It is a few measurable choices: how much heel there is, how far the shoe opens over the foot, the shape of the toe, and where the trouser hem stops. Change any one and the same outfit reads differently.
A true flat has no heel at all, and it works best with a hem that stops above the shoe. A low heel of 15 to 25 millimetres, often called a kitten or small block heel, lifts the back of the foot just enough that a full-length trouser hangs cleanly over the shoe instead of dragging on the floor. Past about 40 millimetres you are in pump territory, and the shoe starts to set the proportions of the whole outfit rather than finish them. Slide the heel in the tool above and watch how the shoe's collar, the line where the shoe stops and the ankle starts, rises with it.
The opening, which shoemakers call the vamp line, decides how much of the top of the foot you see. A low opening makes a long, uninterrupted line from the hem to the toes, which is why it feels dressy and dancer-like. A higher opening covers more and feels sturdier and more casual. The trade-off is practical: the lower the opening, the less the shoe grips, so a well-made low flat has a snug heel and an elastic or bound edge.
The toe changes the mood in a similar way. Round is soft and classic. Square is more graphic and sits well with tailoring. Almond, a gentle oval that narrows to a point, lengthens the line of the foot and is the easiest one to dress up.
The most useful rule of thumb is to leave a visible strip of ankle, roughly 4 to 8 centimetres, between the hem and the shoe. That gap makes the shoe look like a deliberate accent, and it is why cropped and ankle-length trousers are the natural partners of flats. Let the hem fall onto the shoe and the flat nearly vanishes: the trouser line does the talking, which is fine when you want one long unbroken line. With skirts and dresses the same logic applies to the space between the hem and the opening of the shoe. A midi hem, a sock and a low-opening flat make a very different outfit from the same dress with a bare ankle.
Choose the hem first, then the heel, then the toe. The label comes last.
Most of the above is about lightness. If you want a heavier, more grounded look, do the opposite on purpose: a high opening, a square toe and a full-length hem. If you walk a lot, a flat sole with a thin heel lift is more comfortable than either extreme. And if you already own a pair that fits well, the cheapest way to change the look is to move the hem, not to buy new shoes. Second-hand flats in good leather are common, and a cobbler can replace a worn heel tip for a few euros.
Pairs like these start at around €10–20 for simple synthetic versions and run to around €100–150 for more structured ones.