You can use First Class International LETTER and LARGE ENVELOPE (FLAT) rates using PayPal's "Create Your Own Shipping Label.":
https://www.paypal.com/shiplabel/create/

As an experiment I just generated these two (see below) -- 2 ounce international first class letter to Italy ($2.13), and 2 ounce international first class large envelope to Italy ($3.23).
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Does this help?

Robt.
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my web page: http://www.antiquegamblingchips.com/StillsA_TopMaleStars.htm