Well in warmer countries, they may make up to 4 feet high and wide, but unfortunately, all three of these are frost sensitive, particularly the two Donna ones, listed as H3, whereas tricolor is listed as H4/H3. If you live in a comparatively mild and warm part of the UK (like Devon,near the coast) they may survive outdoors with just a little damage, depending on the winter, but in colder regions, and in a proper winter, they may die.

Hi Lynn.

The dimensions can be found by doing a simple internet search for each variety.

Any decent seller will provide that important information, so I'm surprised that yours didn't.

That's true up to a point but lately lots of suppliers have been giving dimensions after 10 years - OK for Hebes but not so good for shrubs which can get a lot bigger than that.

Yes, but the OP appears to have no dimensions at all.

Hebes are sold in many outlets at this time of year with very little information on any label, if there's a label at all - I'm surprised they're even named, frankly, never mind any growing or size info. Sadly, the majority of these are not fully hardy...