So far I've discussed using PayPal's shipping tools to ship domestically in the States. PayPal also provides tools for international shipping.
In many ways, PayPal's international shipping tools are similar to its tools for domestic shipping. You select a shipping service, specify a shipping charge to the customer, and print a prepaid shipping label. The big difference between international and domestic shipping is the need to fill out appropriate customs forms. This task is somewhat tedious, but PayPal helps to automate the process.
You configure PayPal's international shipping settings much the same way as when configuring domestic settings. Log into your PayPal account, select the My Account tab, click the Profile subtab, and select More Options. When the Profile Summary page appears, click the Set Up Shipping Calculations link in the Selling Preferences section. When the next page appears, click the Start button in the Set Up International Shipping Methods section. Fill in the necessary information from there.
As to the international shipping process itself, you have to ship manually, one order at a time, as batch shipping is not available for international orders. Go to your Account Overview or History page and click the Print Shipping Label button for the order you want to ship.
The big difference here is that in addition to the prepaid shipping label, PayPal also prints all necessary customs forms for shipping to the designated country. Just fill out the forms and have them available when you take the package to the post office for shipping.