DON'T GUESS!!!
Get a digital scale. I use a Starfrit kitchen* scale I bought at Canadian Tire. Saw it once more on sale a couple of weeks ago for less than $20.
And a tape measure or ruler.
And bookmark this:
https://www.canadapost.ca/cpotools/apps/far/business/findARate?execution=e1s1
You will also want a Solutions for Small Business number for postal discounts.
https://www.canadapost.ca/cpc/en/business/small-business/shipping-discounts.page?
This number also helps with Paypal and Shippo labels as well as SnapShip labels which are Canada Post's service.
my item will be 2 lbs, and guessing in a box that would be 15" wide x 24" high.
No it won't.
Canada Post went metric in 1974 and any other measurements are guesswork at best.
And rates can change on a gram or a centimeter.
Now are you parting out the dinner service?
What packaging are you planning to use?
Postal insurance does not cover china or glassware that breaks in transit.
You might look into the cost of those prepaid shipping boxes Canada Post has started selling.
Not all will be useful, but the price could be right.
It has been my observation that most china sellers are selling one piece at a time, since the buyer is likely to be replacing broken pieces rather than buying a whole set.
And if you do use Auctions (but don't) make your opening bid the lowest you can be content with getting, since there is a strong likelihood that it will be the only bid. (which is why you don't use Auctions).
Fixed Price/Immediate Payment Required is the gold standard for newbies.
* I also use it when baking so there's that.
