Easyjet warns passengers over item which 'must' be added to your booking Passengers can bring one small cabin bag onboard, such as a backpack, that will fit under the seat for free. Ryanair issues warning to passengers taking backpacks, handbags or laptop cases Easyjet has reminded passengers over sizes of backpacks allowed on board ahead of the summer season. Passengers can bring one small cabin bag onboard, such as a backpack, that will fit under the seat for free. The bag can be a maximum size of 45 x 36 x 20cm and no heavier than 15kg. Holidaymakers also have the option of bringing a larger cabin bag onboard, with a maximum size of 56 x 45 x 25cm, but this must be added to your booking for an extra fee. ‌ With TUI, which also flies from Birmingham, passengers are reminded how "adults and children aged 2 and over can take one piece of hand luggage for the cabin." TUI said: "Each piece of hand luggage can weigh up to 10kg, with maximum dimensions of 55x40x20cm - If your ski boots fit within these restrictions, then they may be carried as your one piece of hand luggage. ‌ READ MORE 11 counties in England set for 'two inches' of snow after UK 23C mini-heatwave "As well as one piece of hand luggage, you can bring one small personal item. This includes things like a laptop bag, a backpack, or a handbag that’s small enough to fit under the seat in front of you with maximum dimensions 40x30x20cm. ‌ "You’ll need to be able to lift it into the overhead storage compartment yourself. Children aged under 2 don’t have a hand luggage allowance – See above Travelling with Children." British Airways standard checked baggage weight allowance is 23 kg per bag. BA states: "The number of checked bags you’re allowed for free will depend on your booking, cabin class and British Airways Club membership tier. "Each customer is also able to pay for up to ten additional hold bags, so long as they are for personal items only. All customers on British Airways, BA Cityflyer and BA Euroflyer can carry a hand bag and a cabin bag, even on Basic fare flights." Article continues below It says: "If you have more than two pieces of hand baggage, or they’re over the permitted size, you may have to put your larger bags into the hold as checked baggage. When you’ve used your free checked baggage allowance, you’ll have to pay to put any extra bags into the hold. "Check your baggage allowance using the calculator below. Please note, the carriage of excess baggage is subject to availability. In some destinations, additional local taxes may also apply. "If your journey includes a flight with another airline, their allowances may be different. Please check before you fly."