I still have (but rarely use) the Air Canada Carry on from about 4 years ago that was exactly 9 in x 15.5 in x 21.5 in. With the Air Canada logos all over and all.
It doesn't fit in the sizer (which I find funny). I've had a couple Gate Agents ask me to check it because it doesn't fit. I then ask them to provide a refund for the bag I was sold because it was sold as Carry On and is AC's own bag. Then they see the logo and let me take it on.