According to [Lufthansa hand Luggage Measurements](https://baggagebee.com/blog/lufthansa-baggage-allowance/), carry-on baggage can have differing dimensions in Business and first class, with the latter having significantly larger allowances. For the most accurate and up-to-date information regarding hand luggage measurements for your specific trip, check Lufthansa's official website or get in touch with the airline directly. It's important to note that these measurements may change or vary depending on your specific flight or fare class. Following these guidelines is crucial to guarantee a smooth boarding process and steer clear of any additional costs or problems at the airport.