All you need to find out is the height, width and depth restrictions of the airline you are flying with. This can usually be found on their website and then all you need to do is find a case that matches the guidelines.Shop all cabin luggage
If your case doesn't meet the size guidelines, you could up end having to put your case in the hold, which could cost a fee and leave you without your belongings close to hand. The wheels and handle are both included in the total size of your case.
Some airlines impose a weight limit too, which can vary from 5kg to 23kg. Always make sure to check beforehand how much you can take and whether any additional items, like handbags and laptop bags, are included.Shop luggage scales
The full list of hand luggage restrictions can be found on the government's website (https://www.gov.uk/hand-luggage-restrictions), including guidelines on baby food, liquids and medicine.