don't know the height. I have two:
1) stihl hs45, which is a "home owner" version of a pro trimmer. It's been good to me (has the 0.75" large finger severing cutters and not the tiny homeowner kind that are more common in box stores here. I don't remember the designation of the "pro" version. Mine is about a dozen years old.
2) a large chinese combi machine that's 52CC and was cheap as dirt. It's also super heavy - it can be made to be three segments long plus hedge trimmer and is a real man's tool when it's that long with as much weight on the end. Not that sharp as arrived, heavy and fatiguing, relatively slow oscillating on the head (which is kind of annoying), but I'll give it credit - over 3 years, it's worked fine and was $160 shipped in the US (also is a string trimmer, brush cutter, and pole chainsaw). It's overpowered probably by a factor of two - I figured it wouldn't be 52cc and wouldn't have the 3.something horsepower it claims. It's just a transferred chainsaw engine and when used as a string trimmer, a blip of the throttle and there's bare dirt. Unstoppable - and ungainly to use for hedges.
tanaka and echo and shindaiwa (I believe at least some have been subject to merger and can be different colored versions of another name) are sold here, and husqvarna's non-chainsaw power equipment has taken some hold. All of it is considered a little substandard to stihl, but all is good if the dealer is good.