Here are two Red Radiance which once flanked a concrete pathway.

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Both are now about half Red Radiance and half Ragged Robin rootstock, and the path disappears in there.
I'd put the height at perhaps 9-10 ft.

NOTE, HOWEVER:
I suspect these to have been planted sometime between 1920 (when the building the path went to was constructed) and 1925 (when the property changed hands).
I believe they have not been pruned, tended or cared for at all for anywhere from 50 to 75 years.

Jeri

Oh my. That's quite a bit larger than I was expecting. What do you think if they ARE pruned, tended and cared for?

If they ARE pruned, I believe they would be the size of most other HTs.
This same site has a Radiance which I did not recognize, as it looked like the more-modern things planted around it.
(I aim to get cuttings of that, later this spring.)

Jeri

I grow two of this clan, Red Radiance and Careless Love. For me CL stays smaller than RR. RR would grow quite a bit bigger, but is easy for me to keep about five feet high and maybe four to five feet wide at its peak size in midsummer. I prune it two or three times a year.

Rosefolly

Oh, Careless Love is a whole different ball game.
Unlike the rest of them, C.L. is a relatively weak grower, and seems likely to disappear under a resurgent 'Mrs. Charles Bell' given the chance (something I've had happen twice).

If I can get that old Radiance out at Camulos to root for us, it can get as big as it wants to.

Jeri

Why do I always need to check here for size? I look these roses up on vendor sites or other websites and am told they'll be smaller than those here say they've experienced. Now I have a monster rose for a 4 foot center spot. Urg.

I asked this here before buying the whole clan and was told by southerners that 5 by 4 would be the mature size. I too learned the hard way that my roses will get much much bigger than most sites tell me, bigger even than most forumers have gotten! Don't worry. I think it'll fit there. And being an ht, some pruning is usually needed anyway to avoid the leggy look.

That's why the Australian book on Teas has been such a blessing from our point of view.
Since they were grown in a climate close to what I'm used to, their size information "works" for me.

Early on, I took my size information from books written in England, and I suspect some vendors do that, too.
This is why we ended up with massive roses planted too close together.

Jeri