Hi, Barbara B. We are sorry for the issues you have experienced. The size letters of different products vary between different regions and manufacturers. Usually the tag size of the product fits the country size, following the size chart/guide in the product details page. To choose a correct size, we kindly suggest that you can measure your own size and then read the size guide on our product page instead of choosing your usual size.
In your case, since the item doesn't fit you, please contact the after-sale customer service via this link https://www.newchic.com/Contact-Us-hc10.html We will offer you a reasonable solution based on the return and refund policy, which you can find on the product details page and the help center. ( https://www.newchic.com/help_center selected Return & Refund). Thanks in advance.