Size Me Up International First Class Mail Shipping Tool

Size Me Up International First Class Mail Shipping Tool The Size Me Up shipping tool will help you determine if your package qualifies to be shipped International First Class LETTER instead of International First Class PACKAGE, saving you and your buyers money. A one ounce International First Class PACKAGE to Australia costs $13.06 to ship. If that same item is small enough that it fits in a 12"x15" envelope and isn't thicker than 3/4", it can ship International First Class LETTER and will cost $2.29. Knowing the difference on this one item can save you $10.77. Ship two items and you'll easily pay for your Size Me Up!