Do check if any of your flights is operated by Iberia Regional Air Nostrum. If so, the small size of the overhead storage area will mean that despite the `acceptable' size of your hand luggage, you will need to hand them to the porters prior to ascending the stairs of the aircraft for them to store in the hold. Only very small items (handbags, small knapsacks) are allowed to go into the aircraft. On disembarking, you will have to wait at the cargo hold area to retrieve your hand luggage prior to entering the airport building. It did not work out well for us one time when we had porcelain in the hand luggage. It was all broken because the porters are not usually very careful with the luggage.