It is difficult to provide an exact shelf life for CRAYOLA products because it depends on how and where they have been stored. Our products are generally tested on the basis of how they are used, rather than how long they have remained unused. We stand behind the Crayola brand name and will work to take care of any quality issue you may encounter. If you have any further questions, please call (800) 272-9652 weekdays between 9:00 AM and 4:00 PM Eastern Time and a representative will be happy to assist you.