We know that sizing can be somewhat inconsistent with Plasticana shoes. First, if your shoes are a bit loose or floppy, we recommend trying them with insoles and/or socks of different thickness. It makes a big difference!
If you would still like to exchange your shoes for a different size, you can request a return shipping label and new size here. If you have any further questions, please feel free to email us at firstname.lastname@example.org