"I dont see why some passengers should have bags that are bigger than everyone else. Follow the rules and you wont have to pay."
Fair point, BUT, why does RYR and a couple of others reduce their dimensions by 5cm compared to standard ICAO hand bag size, and on the same type a/c as other carriers who use the ICAO size? Someone will answer, 'because they can'. True, but that is not a satisfactory answer. They are in the customer service industry and irritating your source of income with petty adjustments to standard rules just to trip up innocent pax for a fine. You buy a standard ICAO bag and then get screwed. It has even happened that a pax travelled 1 way with a sensible ICAO compliant LoCo carrier, and t'other way with one of the childish ones. Air rage started at the gate. I even saw ez in MAD do a check at the gate. The wheels of the bag did indeed go into the cage, but had to be manoeuvred, rather than a straight drop in/pull out. Nope, that was going to be an extra 25euros for the hold. Guy kicked and smashed the wheels off in front of some rather disturbed pax. Not a good image.
You also get some more sensible non-UK carriers who allow the cabin bag and sensible laptop/lady's handbag/dutyfree/ as an extra. The 1 bag rule is an unnecessary inconvenience and sensible discretion should be enough. It is the case that a B738 189 seats can not accommodate much more than 150 of RYR's own samsonite bag. What then when the flight is full? Delay code down to themselves.