Each airline may have different baggage policies depending on your flight route and seat class. You can see your baggage allowance in the search results while booking your flight, or later on your e-ticket.
1. Go to the Bookings page and tap your e-ticket.
2. Scroll to the Passenger(s) section.
3. You’ll find the baggage allowance listed for each passenger.
The weight stated refers to the total weight you're allowed to bring. You can carry more than one bag, as long as the combined weight doesn't exceed the limit.
You can purchase extra baggage during or after booking.
Please refer to this article: How to purchase extra baggage