Plan ahead for your Baggage allowance so you not dissapointed at Check in 

You are allowed to take one bag and one personal item with you onto your flight.  There are certain size and weight restrictions to ensure your belongings can fit in the cabin. Personal items usually include a handbag, briefcase or laptop bag that can fit easily underneath the cabin seat. In addition to a personal item,you may be able to bring on an additional bag or suit pack that can fit easily and be lifted by the passenger, into the overhead locker. 

Carry-on weight for bags may vary between classes and airlines. As a guideline  Economy Class passengers are allowed to carry one bag at 5kg to 7kg per person.