My bad.
Allen Garden is roughly 300M X 240M = 72,000 sq m
Queens Park from the map is of similar size, or a bit bigger if including nearby greenspace
Central Park: 3,400,000 sq m
Grant Park: 1,290,000 sq m
Boston Common: 50 acre, or 202,000 sq m
Combine Allen Garden, Queens Park, along with St James Park, Moss Park and Grange Park, and it is probably similar to Boston Common, or a fraction of Central Park/Grant Park. And Boston is a much smaller city.
Yes, Toronto does have its ravines etc (people will definitely bring it up), but one, those are not man made urban park, and two, I for one am unwilling to take a subway plus 30 minutes bus just to visit them.
I am not saying Toronto lacks green space, but it does lack large well maintained urban parks with easy access. If the Gardiner did come down, there is zero chance a large park will be created, because this is simply not how Toronto thinks/works. It will always be residential/commercial.
Sherbourne Commons and Sugar beach are nice efforts. But let's face it, both are miniscule, not big enough for one to walk for 5 minutes. Toronto needs a park what extends from Yonge to Parliament covering the entire area south of the Gardiner. But we all know it will be buildings or so called "neighbourhoods".
In downtown, we have quite a few "parkettes", not even one decent sized park where you can stand at one end without seeing the other. This is why I don't care about the fate of 11 Wellesday. Even if it miraculously becomes a park, it is just another tiny one where people walk their dogs. More than likely it will be condos plus some tiny green space for a 3 minutes walk.