Airlines are pushing for smaller and smaller bags for the overhead compartments. Of course, travellers violate these stipulations all the time and get away with it. Some grossly violate the rules and get away with it. Yet, if you want to be bag compliant and not have to worry that your bag will be snagged and stored elsewhere, this bad is compliant with the rules. It is very small, but if you roll your clothes you actually can get a lot of stuff into it.