We have found that not all t-shirts are created equal.  Dimensions can vary depending on which blank manufacturer is chosen. Last Wave has assembled a collection of some forty classic surf brands, some of which we produce under legal license. Others are printed by the legal owner of their brand. Unfortunately, we cannot control which blank manufacturer a brand owner uses for his apparel. Unless otherwise noted, all Classic Fit t-shirts are printed on full cut, 6 oz. 100% pre-shrunk cotton blanks. Our Modern Fit Classic t-shirts are printed on lighter weight blanks and generally run narrower than Classic Fit tees.  Please refer to our Size Chart for more information. Knowing that there are some differences in the t-shirts available from Last Wave, we do everything we can to offer the best quality and fit possible. If for any reason you are not satisfied with a product you recieve from Last Wave, please let us know. We will be happy to exchange or refund at your request.