How long does USPS standard international flat rate shipping take from US to Germany?

I'm actually looking for how long it takes from Pennsylvania to Germany, the state of Baden-Wurttemberg, my local post office says first class is 10-14 days and that includes the weekends, but i just looked it up just to get another opinion, so thats what my local post office said, i don't know what state you live in, it might depend, so I won't sware to my answer, you can still try to do more research just to be safe.