PeniMaster Pro rod extender package size?

[LSXForce]

What dimension is the box package that it comes in? I'm trying to get a PO box for the order, but I would like to know the dimensions of it so I will know what size PO box to get. Can anyone give me the measurements of the [words=https://www.internetzahlung.de/cc-aktuell/bestellung.php3?PID=PM0440A&Sprache=en]PeniMaster Pro[/words] box packaging?