Baggage
An economy class passenger can carry one carry-on bag weighing up to 7 kg. A bag may be up to 56cm x 36cm x 23cm. A business class passenger may carry two bags weighing up to 12kg and measuring no more than 56cm x 36cm x 23cm. Checked-in baggage allowance: economy class - 2 bags (23 kg each), business/first class - 2 bags (32 kg each). The size of all checked bags must not exceed 90 x 72 x 45 cm.
Etihad Airways Baggage rules