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).
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