I agree with the non-flat rate box. I was able to ship my two letters and my Epcot pages in a 12.5 X 15 X 3 (or something like that) non-flat rate box, with DC, and it was still 10 cents cheaper than flat rate! And I'm mailing from Boston... I don't know if that will make a difference for you? The boxes are still free from the online postal store.