Unsure of why this got returned - Shipping from Canada to the USA, added the correct number of stamps as per the weight and destination, dimensions are well within the limits of
Canada Post Postage Rates 2024 - Postalytics
International Mail
Calculate the dimensions of your mail | Personal | Canada Post
Can I use these US rate stamps to ship a letter domestically (within Canada)? : r/CanadaPost
Canada Post rate change is now in effect! – Postal Advocate Inc
Let's Check the Latest Canada Postage Rates 2024 PostGrid Canada
How Much Does Canadian Postage to USA Cost? (2024)
Canada Post logo and symbol, meaning, history, PNG
Canada Post raises awareness for organ and tissue donation with new stamp
United States Bicentennial, Benjamin Franklin - Canada Postage Stamp
Canada Post Sends Scent Blocking Envelopes : r/mildlyinteresting