The majority of airlines in the UK actually don’t have a weight limit on their small, personal, underseat luggage. Airlines will monitor the size of the bag and make sure it’s within the 45x36x20cm size restriction, but they won’t actually weigh it. If there is a weight restriction on your bag or you’re worried about the weight of your cabin bag then I’d recommend getting a pair of travel scales to weigh the bag. You could weigh it on your bathroom scales at home but it’s unlikely you’ll have access to bathroom scales for your return journey. This is annoying because it’s way more expensive to pay for your bags at the airport (rather than paying in advance online). But it’s also annoying because your bag might go in the hold of the plane so you’ll now need to queue up to collect it at the baggage carousels when you arrive. You also won’t have access to all of your stuff during the flight. Here’s a question lots of people ask. Does it really matter if your easyJet hand luggage is too big? Technically, you could use vacuum bags to remove all the air from your clothing so you can fit even more in your 45x36x20 cabin bag. Contrary to popular belief, you don’t need to use a vacuum cleaner to remove the air from a vacuum bag, you can simply squeeze the air out and seal the bag meaning you can use it for your return journey when you don’t have access to a vacuum cleaner.