Free: USPS First Class Mail International Rate Guide
Stamps.com has released a FREE First Class Mail International Rate Guide (downloadable PDF) that highlights shipping rates by international country zone for packages up to 4 lbs. in weight (rates are shown for each ounce).
For e-commerce sellers, the guide is a quick-reference to help you easily understand international shipping costs for your overseas shipments. The Guide also includes details on package size restrictions and delivery times, along with examples of qualifying products that are typically shipped overseas using this mail class.
The First Class Mail International Package Rate Guide is FREE and can be downloaded at http://www.stamps.com/whitepapers/first-class-mail-international-rate-guide.pdf