Yes, you can return your dress and exchange for a different size. To guarantee a better fit, we usually suggest our customers to choose the free custom sizing service when placing the orders, which means the dresses are made specifically to your own measurements. Moreover, our customer service will confirm your measurements before producing your dress. It will greatly reduce the potential measurements alternation. In a word, we will try our best to make your dress fit you like a glove. Get detailed info at https://www.colorsbridesmaid.com/refund-return-policy.html. Please read it carefully, we process the return of any item according to this refund and return policy.