The change of size / model is very fast and simple. You must only make a new order with the new size or model. We suggest you consult the info at the bottom of the page, where it is explained in more detail.
For any question about a product, an order
Failure to purchase
If you want to know what state your purchase is.
If you have doubts about the model to choose or the size. At the bottom of the page you can find + info to solve your doubts.