Please keep in mind that grading isn't an exact science, so there will be slight variations within each grade. That being said, if you're concerned that we've made an error, please open a ticket with us and we'll be glad to take a look and see what we can do for you. To be considered for an exchange or refund, you must contact us within 48 hours of receiving your order; requests will be evaluated on a case-by-case basis.