Below is taken from the company website... How can I exchange an item for another size? To return your order for an exchange simply head to our returns portal here then select “Exchange” from the Return Option drop down and complete the field with the item Code, Colour and Size to request your exchange and send everything back to us using our free returns service. Please note we can only exchange for the same item in another size. Birthday pair of Crocs were a size too big for me. Asked to change the 11s for a size 10. No was the answer, it has to be within 28 days. No flexibility no customer service skills or will shown to help. Just no. Not impressed at all with the low level customer service.