Jet2 and EasyJet passengers are being reminded to pay attention to a lesser-known rule that applies to all 'wheeled and handled' bags. Each airline has its own rules regarding the hand luggage passengers can bring on board and the type of suitcases that can be checked in. Some airlines enforce strict size limits and holidaymakers found with oversized luggage may face additional charges at the check-in desk or airport gate.

EasyJet's standard baggage policy allows all passengers to bring one small under seat bag on board free of charge. There's no weight limit, but the bag must fit under the seat in front of you and cannot exceed 45x36x20cm, like this Chelsea Overnight Bag from luxury suitcase brand Antler. Another great option is this Travel Backpack - Cabin Size , which is currently discounted to £23.

55 and meets the strict under-seat size regulations for airlines such as RyanAir. A secondary rule stipulates that this bag measurement must include any wheels and handles. EasyJet utilises baggage sizers at its check-in desks and airport gates, and passengers may be asked to place their bag inside to demonstrate it fits.

If the main body of the bag fits but handles, wheels or straps protrude and cannot be tucked away, passengers may still incur charges. EasyJet's £48 Airport Bag Fee is applicable to any small hand luggage bag or large hand luggage bag that exceeds that person's paid-for allowance, reports Birmingham Live . Read more: Antler's summer sale slashes up to 40% off.