If you don't happen to be one of those people whose measurements match a particular size, go ahead and order the size that comes closest, then use the comments box at the checkout to tell me your actual bust, waist, hip and trunk dimensions. That will let me cut your new swimsuit to fit you precisely. Your right to a refund, if not totally happy, will not be effected. In reality, it is by ensuring my swimsuits all properly fit, that I get so few returns in the first place!