Hi Mona! It depends entirely on what type of mailer/box you are using and what shipping speed you want to use. The USPS has a very helpful price estimation tool, which you can find here: http://postcalc.usps.gov/
Hi Mana! I'm so sorry, I just realized that I misspelled your name. I have a friend named Mona, so it's muscle memory to type it with an "o". *sheepish*
I ship jewellery internationally from the UK. If i ship to the states it typically costs £3 - 4 it all depends on wieght and size of the item, def check with your choosen mail carrier as they will be able to advise on a postage estimate.
I had a medium box from usps that came to about $15.00 as I remember it was to Ireland. Tenerife was like $30 (small package). So it depends on the country weight and size of the package.