Yes...it even happens to us!  We will go to great lengths to make things right! Whether the size you ordered isn't ideal for your personal canal size, or you are considering returning due to filter strength, if you are in need of a repair, if you have to replace it, or ReNew it----we aim to please!  We are proud to be the only earplug company to be able to accommodate you to these lengths.  We realize your first time with EARasers may not be perfect due to size or attenuation you are exposing yourself to, but we strive to work with you to get you the best possible fit and feel for your uniques needs!