Read below the long red line: "For Domestic shipments, the maximum weight is 70lbs. For International shipments, the maximum weight is 20lbs." More on reddit.com

EMS is Global Express Guaranteed. There are no flat rate options for GXG. Priority Mail Express International only has one option for flat rate, that being envelopes. Priority Mail International can use the specified boxes on this page: https://pe.usps.com/text/dmm300/notice123.htm#_c313 - You can have the boxes mailed to you for free by going here: https://store.usps.com/store/shipping-supplies/international/_/N-6vj2li - it also has the international flat rate express envelopes. The easiest way to do the customs forms and purchase discounted labels would be to use https://www.pirateship.com/ - there's no membership fee to use that service, just gotta register an account and purchase the labels with a US credit card. If the purchaser is in Europe, Middle East or SE Asia, every item within the package has to also have a HS harmonized tariff code as well as country of origin. Make sure you read the country's conditions of mailing - many countries ban a variety of items, often international buyers will try to buy things which their country bans, you're responsible for what you mail. You can find the listings for each country (including group codes for the notice 123 price list) here: https://pe.usps.com/text/Imm/immctry.htm More on reddit.com

I can confirm OP. USPS International Express Priority Mail (IEPM) is absolute garbage. Never use it ever. I sent an envelope of time sensitive documents to the Philippines that were needed for CRBA interview that was scheduled a month in advance. I've been told that that their 3-6 day promotion wasn't actually true (Hence the * next to the advertisements). The Post office routinely blames customs for this. Knowing this, I mailed on June 24, 2024 which needed to arrive before July 25. By July 1st the tracking still says the package has never left the original post office I handed the envelope to. I've spoken with USPS staff and they all tell me "No sir - we didn't lose your mail. Its still too early to be worried. We are confident everything is on its way" I also made phone calls regarding it to USPS customer service. Although they were very kind and understanding, all I could do was put in search requests and inquiries and wait patiently for response. Panicked by how little time remained, I created a new packet of documents identical to the first. Each packet contained Exemplified court documents, and over 25 notary stamps which cost 10$ each from a public notary. On top of shipping charges - each packet sets me back $350. I mailed the Second package on July 3rd taking time off from work to fill out documents, visit court house, and get notary to have a new packet prepared ASAP. Second envelope arrives in LA on the 7th. Sits there for two days. Leaves LA 9th. Ends up in Tokyo 2 days later. Sits there for a week. Then they put it on a ship to Manila which arrives 5 days later. They put it on a ship again from Manila to the destination city which arrives in 3 days later. Today my wife goes to their post office, asks about the envelope and they told her "Oh, its at the pier. It should be here at the post office sometime this week. Should be here by Wednesday and we can deliver it in a day or two. This will make us miss our appointment. Thankfully the staff there were understanding of our situation that they made special arrangements to search for the envelope at the pier and deliver today. So from July 3 to July 22. That's International Express Priority. Sitting in customs. And being put on ships. So much for being Priority and Express!! As for my first envelope? Its gone. USPS has been unable to locate it. To this day the tracking hasn't moved from the original post office. Although their customer service have been very kind to me over the phone, and very understanding, it doesn't get mail to the destination. They have declared it lost. Now i must go through a long process to get my shipping costs back and claim on the 100$ insurance - which I'm sure they'll fight tooth and nail to not pay out because the notary didn't give me a receipt. TLDR: OP is right. Never use USPS International Express Priority Mail. Its garbage, and 3-6 days is a blatant lie. More like 3-6 weeks. USPS has another option you can try. Global Express Guaranteed (GEG) Which is 2-3 days guaranteed or your money back. Might be alot better. Its twice as expensive and I guess FedEx does all the shipping anyway. More on reddit.com

What is the price of shipping without using a flat rate? More on reddit.com