How tall is Phoebe Tonkin?

She's clearly shorter than Natasha Henstridge who plays her on screen mother on The Secret Circle and Natasha is 5'10. Thomas Dekkar is 5'10" and even in heels she only appears to be about his height or a little taller but not much.

I'm thinking more like 5'7 1/2" to 5'8 1/2" maybe 5'9" tops what did the CW do go and cast people from H2O, you're right Claire Holt and Phoebe Tonkin are the same height in picture and heels that are about the same length

Actually she doesn't look much taller than her co-star Shelley Hennig on The Secret Circle and she's 5'8".

In the past these girls would be considered tall on television or in the movies, but I've noticed a lot of female actors are now between 5'8" to 5'10". I'm 5'10" and some inches myself.

I always thought the reason Natasha Henstridge was initially cast in the Species film was because she was a tall amazonian type looking woman at 5'10", and was suppose to represent this perfect female human form, e.g. tall buxom blonde bluish to green eyes, at least what they envision as perfect for that film.
agrees with all of the above