Qatar's carry-on baggage allowance is:
Maximum dimensions for each piece of hand baggage are 50x37x25cm (20x15x10in);
Almost all other airlines (updated May 15, 2019) have at least 21.5" height for carry-on luggage. Also, if it were a combined measurement, this wouldn't be a problem, but it seems like the maximum height is fixed at 20".
Why is Qatar's maximum height for carry-on luggage only 20"? Do passengers with carry-on bags that are 21" have to have them checked in? Anyone have experience with Qatar?