Question: can you take a rucksack as hand luggage on ryanair?
Answer: With Ryanair, if your carry on travel backpack and hand luggage exceeds the restricted size of 55cm x 40cm x 20cm even by 1cm in any aspect you're in trouble. They will make you check in your carry on which at the airport costs £50 ( £13- £24 online) so beware.