How many kilograms of luggage are you bringing with you Mary? Etihad has free 30 kilograms free... 23 kilograms for checked in --- and the 7 kgs. for hand carry.. Just make sure your hand carry luggage is big enough to contain 7 kgs because they only allow ONE carry on luggage...
We did not actually buy extra luggage from etihad so I do not know.. Ricky's post is very informative... I only have 18 kgs. checked in luggage.. (I did not have much to bring...)
Have a safe flight... and enjoy etihad's service...If you used a travel agent, try the web check in so you will be able to avoid long queue...
This information might also be helpful...
To check in online
http://www.etihadairways.com/sites/E...ebcheckin.aspx
Baggage Information
http://www.etihadairways.com/sites/E...ges-other.aspx