I was told my 4x4x4 box was too small to ship by a nasty postal person at the post office. I’ve been using this size box for smalls for many years. EBay is selling this size shipping box. When prompting for smallest box accepted by usps it says 6” x 3” x .something for thickness. What is safest way to ship smalls that do not fit in flat rate box...and also not so expensive? Help.
