Unfortunately, we don't offer exchanges but we do offer free returns. You can return your order and then re-order the item you wanted to exchange for, in the correct size and colour desired online.
Our returns forms can be found at the following link: https://www.theirishstore.com/returns 
Please be advised that when returning items, you must use the return label we have provided you with. We will not refund the cost of postage if you return your item with any other shipping label other than what we have provided to you.