Another one here who wasnt sure of sizes. And tbh I'm glad I did or I would have ordered the wrong one.
I ordered another one for my husband too, making 3.
In the end I cancelled the one I didnt need because I didnt want Apple to do the cancelling for me thanks to the two per ID thing. Wasn't risking it.
I did however intend or selling the watch for retail price to my friend who had issues at checkout.