I once made a box of the maximum size and shipped it to a fellow in Atlanta with no problem. I think I had no problem because I put wheels on one end and a handle on the other end. That made it easy to handle. Like a suitcase.If you make one and its hard to handle a lazy worker might not want to tackle it.
TOM made good comments in the beginning but in the end he should have changed his signature to NOM. Nasty old man.
Anytime a newby asked a question he would berate him for not finding his answer by searching the threads.
A search engine is not always easy to handle. You need to know what you are looking for, know the common name and be able to spell it.