Max. one week
5 days
First class mail delivery takes 3 to 5 day.
First Class Mail is delivered in three to five days.
It shouldn't take too long
USPS first class mail international from the United States to the Netherlands takes approximately one week.
I send things from Florida to Nigeria and it takes about 1 month using USPS Priority mail.
1 to 2 weeks or more
By the USPS, 2-3 days.
It depends on how far away the to locations are.
USPS first class mail international 2-3 Weeks
UPS or USPS 2-3 days tops