Same as in post #34:
Costco Item 670821
BRIGGS & RILEY
21" BASELINE CARRY ON
BLACK
$189.99
BTW from my measurements it meets the 22" x 14" x 9" near-universal US limit. There should even be room to expand it a bit.
I also noted that some airlines such as UA indicate the rule is 45 linear inches or 22 x 14 x 9. Using logic or Boolean algebra, then any bag that meets the rule of 45" is legal; the 22 x 14 x 9 is superfluous and merely an example. However that may not be how some interpret it. (This is why our attorney friends add that phrase "without limiting the generality of the foregoing" when adding examples.) End of opinion piece.