Originally Posted by
maxmin
Thank you, all. Your answers more or less confirm my hunches. I would measure it and report back, but this is a booking for my son (poor thing, 18 hours to SIN in regular Y seat

) That's Economy Light for you!
Still when you're only 17, it's all good!
Tell him to bring a tape measure and get friendly with 34abc/jkl. I'm sure he'll run out of other things to do mid flight.