" Your actual Mileage May Vary " in this case is quite true.

I work with cm primarily, so inches remains a subjective observation for me. I do think that 29 inches might be a bit much with the changing air luggage standards, and some airlines, which may try and take advantage of two inches or more to possibly charge you excess baggage fees.

I do hope you find what works best for you. Boa Sorte / Good Luck !