Van Keeken schoenen asked us to provide their webshop (on the Lightspeed eCom platform) with the available size variants for their products. As soon as you move your mouse over such a product, the sizes appear on screen ("on hover"). Unavailable sizes are also shown as such so the visitor knows which sizes are in stock. This technique requires some extra programming work to retrieve the necessary data from the Lightspeed platform. We provided both the scripting and the design.