A class is a category under which your trademark will be registered. If your product is related to clothing, the trademark will be registered under International Class (IC) 25. If you are in the business of providing advertising services, IC 35 may be appropriate for you. Similarly, education and entertainment services are registered under IC 41.
You can register a trademark under one or more classes as well. For example, if you provide advertising services under a trade name, and also provide promotional T-shirts, you may register the mark under IC 25 and 35. Fees are calculated based on number of classes. Please request a quote to learn more about our fees.