Intellectual Property Offices worldwide use a trade mark classification system that groups together similar goods or services into 45 different classes. This is referred to as the Nice classification. Each class contains a list of terms. What goods do you sell, or are intending to sell in the future? It is important that you only include the goods/services you intend to use the mark on now and within the next 5 years. The. It's important you choose the correct class and terms, as your trade mark will only be protected for the goods and / or services you select in your application. You cannot add extra goods or services after you have applied. Your trade mark application includes one class in the cost of a trade mark application. Extra classes cost an additional £50 per class. Our search UK trade mark classes service will help you search for and classify, the goods and/or services you need to apply to register your trade mark. You can also: 1. email the Intellectual Property Office Classification Team. You.