The 7 kg cabin bag is the rule across most of Asia, and it is enforced with a scale at the gate on many carriers. Full service airlines such as Singapore Airlines, Cathay Pacific and Japan Airlines are more generous on checked baggage to the US, often two free bags where a European carrier gives one.Low cost carriers here, AirAsia, Cebu Pacific, Scoot and the Chinese and Indian budget airlines, sell checked weight in tiers rather than per bag. Each page shows the figures read off the airline’s own site, with the date they were checked.