I haven't had a yet, so forgive me if I'm being dopey, but doesn't your package fit fine within those listed rules?
There were some people posting about this exact issue in a Facebook group for Mondo collectors recently. They seemed to think it was someone in a West Coast customs office somewhere misunderstanding the rules as folk from other areas of the US weren't having this problem.
this package was returned twice. First time it was resent by the guy at the po that does know everything.
as to measuring.. packages are measure by a laser device as they pass on the conveyor belts and redirected to a side belt when they are over dimension.
it's only since October 1st, so my suspicion is that more & more people will be reporting this issue
I have no way to fight it, nor dispute it and I'm not interested in wasting $27 a pop to keep trying (shipping+tube+supplies. doesn't even include a stipend for labor)
shipping has been marching in this direction for years, but I thought there would be a couple more years to it. Trump's rise has emboldened and driven the GOP to keep screwing with the post office and believe it or not, heavier boxes now ship cheaper by Fed-X ground. I've been selling by mail for more than 40 years and factually, markets keep having roadblocks dumped in front of them. The fact that the post office is being destroyed by the Republicans is a sorry commentary on how little they give a damn about anything but themselves and by the way, approximately 40% of postal employees are former military, so this also shows how little the Right really cares about our veterans.