They came in a couple of different sizes, with the one I have (below) being about five inches high while a rarer version stands more than six inches.
As you can see by the ad, they could be ordered, but I think many kids also had their dads buy them at big league rinks. At least that’s what I did, at Maple Leaf Gardens all those years ago. A nice Habs one which I ended up breaking because, after all, I was a kid.
It was a bummer that I broke it and I made sure I got another one, although it took about 50 years.