I’m just surprised this bag is just outside carry on dimensions since Rick advises light travel and travel-on baggage...
There is no single standard for luggage dimensions/weights. Every airline is different (and enforcement policies vary with the weather and mood of airport staff). And whatever limits that so exist are subject to change (and do change occasionally).
So no business can say for sure that any bag they sell will meet "the international carry-on limits" - because no such limit exists. There are as many "international carry-on limits" as there are airlines in the world (which are large numbers).
You need to discover the specific limit(s) for the actual airline that you will be traveling on, check your baggage dimensions/weight, then you either live with those limits, or take your chances on the enforcement. Yes, that can be an inconvenience.