It fits in easyJet small underseat sizer
Tried for size in sizer, easily fits in. I know I can get a good weeks worth of holiday clothes in it as I have a soft bag of same size and I have managed with that. Just needed some wheels to make transiting through airport easier. Aerolite is a good make and good quality as I also have two of the aerolite overhead locker cases, the next size up, which you need to pay to use on plane this size is free as fits underseat. Packed direct have great customer service and although sell through Amazon too, it's usually cheaper to purchase direct. Ive bought four bags and three cases in total from packed direct, very good company.