If you don’t want to transport computers and cameras in aeroplane hold luggage, you may need to buy new carry-on bags.

Airlines are changing the rules because too many passengers bring the the maximum size luggage. New worldwide rules:

The recommendation by the International Air Transport Association suggests an “optimal” carry-on size at 21.5 inches (55cm) tall by 13.5 inches (34cm) wide by 7.5 inches (19cm) deep. That’s smaller than the current maximum size allowed by many airlines.

The new recommendation is 56% of the current volume of the British Airways allowance of 22 inches (56cm) tall by 18 inches (45cm) wide by 10 inches (25cm) deep.