Originally Posted by
jonu
... Showed it fit in the sizer, but was told it was still too big because I had to push it in. .....
The sizer has one extra inch in each dimension (than the posted size requirements), so if you had to push the bag to fit, then the bag is oversized.
But the inference if it fits, it good to go -- so assuming the push did not deformed the sizer, it should have been allowed -- but sounds like it was oversized.