I can't compare them to other airlines, but I have a pair of the ones from SQ from 2008, made by Givenchy. They're nominally a medium but seem very generously sized to me, and they are the most hideous shade of mustard brown I've ever seen. 96% cotton, 4% lycra - and the worst aspect is that there's some very scratchy binding tape along the inside where the collar meets the neck that makes the top unwearable as far as I'm concerned. I'm happy to send them to anyone who has a use for them...
wg