My wife and I visited the USA last week. Now that we are back in The
Netherlands, she wants to buy a number of items via the PotteryBarn
website. Unfortunately, PotteryBarn does not ship outside the USA.
What I am looking for is a service that lets me use an USA address
which I can supply to PotteryBarn. As soon as the PotteryBarn package
is delivered at the USA address, it should be shipped to my European
address by this organization. This services must apply to orders of
any size, varying from small items (such as lamps) to large items
(such as a sofa)

Does any such service exist?

Dear Raul,

There are services handling such requests. It shouldn't be a problem
with the packages, but furniture might be a problem, and I recommend
that you'll contact the shipping company for special arrangements
(shipping it in a shipping container?).

MyUS
<http://www.myus.com/> 

USABox
<http://www.usabox.com/> 

USA2Me
<http://www.usa2me.com/> 

MailServiceCentre
<https://www.mailservicecenter.com/home.htm> 

MailForwarding.biz
<http://www.mailforwarding.biz/> 

Mail  Forwarding Service
<http://www.usglobalmail.com/default.asp> 

I hope this answers your question. Please contact me if you need any
clarification on this answer before you rate it. My search terms:
["us mailing address"]
[forwarding service ]

Just like a woman!

They always want something they can't have.

Next time, I suggest you leave her at home.

Keukenhof is very nice this time of year.

Or the Wassenaar Dierenpark. (If it's still there.)