If you are travelling on an Iberia flight operated by Vueling, you can take 1 item which may not exceed 55x40x20 cm (height x width x depth) and may not weigh more than 10 kg. It must also fit in the sizer available at all airports. You can also take a smaller bag or briefcase (maximum size 35x20x20 cm), plus an additional bag containing your airport purchases. Both of these items must fit under the seat in front of you. At the boarding gate, any hand luggage (or accessory) that does not comply with this regulation (i.e. that exceeds the above quantity and/or dimensions) will be removed and stowed in the aircraft hold at an additional cost.
If you are travelling on an Iberia flight operated by Vueling and connecting to an Iberia flight operated by Iberia in which you are travelling in Long-Haul Business Plus you may take the 2 items of hand luggage included in your fare.