Oh just slip it in an envelope and ..... well, perhaps not.
Are you buying the stove from a retail store or privately?
A B&M store should be able to give you advice, and perhaps even has a shipper they use from time to time. Although Canadian prices being what they are this is unlikely.
The B&M however could supply you with a well packed unit ready for shipping.
Privately, packaging would be the big problem. You will need to know the packaged weight and dimensions.
Otherwise, call a few cross border freight companies. They are in the Yellow Pages of your phone book.
The paper one.
You can find it in the public library. Ask an elderly person how to use it.
That last remark is not meant to be snarky. I had to show a barista how to use the Yellow Pages a couple of weeks ago, so I could call a taxi. The book baffled her.
And then there is customs. But US residents can import up to $800 at a time, so while you will need customs forms (the post office has them, but so will your freight company) it is mostly a check on illegal imports not anything about paying on the doorstep.
