I retired from the USPS 2 1/2 years ago and have lost touch with pricing. I looked up the new rate chart and it is overwhelming. - While researching the rate changes, I saw that it stated 'Adverage' change. There were some prices lowered and some that had no change and some with small increases. The International rates realy took a hit. Rates for Canada and Mexico Flat rate is $12.95 and all other countries $16.95 for the Priority envelopes and small box. I have attached a link to the rate chart. It is quite large and confusing. Has a lot of commercial rates that most of us have no use for. For the International rates scroll appx 2/3 down the pg-
http://pe.usps.com/text/dmm300/Notice123.htm#1012541 Another link I found shows the percentage of change. This pg dosen't seem true looking at the pricing you made examples of. Scroll 1/2 way for graph.
http://faq.usps.com/eCustomer/iq/usp...#what_specific