I should add it depends on your perspective as well, obviously.
I'm sure there are people for whom Portage Avenue West feels bigger than anything in Halifax. It's a wide, 6-lane avenue lined by short commercial buildings with pockets of midrise commercial/residential buildings mixed in. It goes on forever... you couldn't even drive that far in Halifax, you'd be in Bedford already. It is endless this:

Google Streetview
And there are many other roads like that - Route 90, Pembina Highway, Nairn, North Main, etc. Any of them are longer than anything in Halifax.
But, to me, they don't feel bigger. To me, it's like driving past a strip mall in suburban St. John's. Sure, it's endless, but it does NOT feel like a city to me.
And you only have to go half a block in any direction and you're back in among single-family, detached homes.
Granted, Winnipeg has the finest residential neighbourhoods of any city I've been in (minus the stucco, that's my only complaint) - but neighbourhoods like River Heights, even the poorer ones (excluding the neglected areas where poor First Nations families are generally funneled) like Lord Roberts, are spectacular. Here was my street in Winnipeg, for example (that's my red civic, ha!):

Google Streetview
That's about as crappy as a residential neighbourhood gets south of Portage Avenue, and it's still amazing.
But, again... it doesn't feel bigger to me. Any residential street in St. John's proper squeezes more homes into the same area, has smaller front lawns, etc. It feels denser here, and that, to me, translates as bigger. I mean, the above looks like every other lot should have a camper on it. It's cottage country.