I had spent ages looking for suitable bags for my partner and I to take on a Ryan Air flight. As well as your hand luggage bag you are allowed a small bag 30x20x20 cm. I had found very little at that size and really wanted a rucksack type as that is what we would normally use whilst away. Then my daughter mentioned Decathlon. A very helpful member of staff on the phone checked the size of a bag I was looking at (my one criticism: Why do you just give capacity in litres and not measurements on the website?). I ordered 2 bags and they came in less than the advertised time...including postage , total cost : Under £10! Brilliant!