I know of a very old plant of 'Betty' that grows to approx 6' high and almost as wide. It was planted before WW1 so it's approaching 100 years old.
A very beautiful old plant. Despite its age, it looks very healthy and vigorous and the foliage is as attractive as the blooms.
It is not pruned heavily in the winter. The owner removes any dead or exhausted wood and then just lightly cuts back and shapes the rest.
From a distance it looks more like a Tea rose than a Hybrid Tea. It's a shapely plant that is well covered with healthy foliage and many subtly coloured flowers appear all over the plant and tend to nod a bit.
What appears to be the same rose can be seen in a number of old gardens around Perth. Most of these are pruned more traditionally - cut back reasonably hard to a few main stems - and when pruned like this it grows much more like a typical Hybrid Tea with fewer, longer, stronger stems and fewer, larger blooms. These plants get to 4' - 5'6" high depending on care and conditions.
I have an own-root plant - from a cutting of the old plant - but it has only been in the ground for one season so it's still quite small and it's too early to tell how quickly it will develop.
We are in Perth, Western Australia, where the winters are very mild and there isn't a real dormant period so roses do tend to get taller than average here.