Every airline company has its rules about the passenger’s luggage weight, if your luggage is overweight, you will be charged some extra expense. Generally, one person can take one checked luggage and one carry-on luggage. Here under is the standard for economy class tickets holders:
Each hand luggage must not exceed 204055 centimeters (81622 inches) and should be less than five kilograms (about 11 pounds) in total. Any items that exceed these criteria are treated as checked luggage.

Each piece of checked luggage should not exceed 50 kilograms in weight (110 pounds) and 4060100 centimeters (1624 39 inches) in size.