Another "trick" to international mailing... Use the "padded flat rate envelopes". You probably have to order the envelopes online (but they are free). A box will be $43 or so, but the envelope will be around $24 to ship (at least to Canada). You can put up to four pounds in them, and they are pretty good envelopes, so don't tear easy. I've been able to stuff quite a bit into one, more than I imagined at first.