This brief note is not legal advice and is for educational purposes only.
At the time that you file a trademark (mark) application it is classified into an International schedule of classes of goods and services (IC). As of January 1, 2021 here are the ICs with a brief explanation. Some of the spellings reflect the international character of the spellings.
So there you have it. Trademark classes IC1 through IC45. IC1-IC34 covers Goods and IC35-IC45 covers Services.
Your attorney can advise you on this and other substantive issues. Consult them.