Hi dauphine, I don't have specific experience with the Cabin Plus, the only data point I can contribute is with my Proteca Maxpass which measures H:46cm/W:38cm/D:25cm, so with width a bit larger than AF carry-on regs, but no one has ever checked sizes when I have flown AF/KL. I know it's a bit snug in an Embraer overhead locker (and max size for an ATR overhead locker), so if you often fly via 2G for example I would probably go for the Original Cabin for example to avoid frustration of trying to get the bag to fit in .