Somewhere between 1 and 1.5 metres high and wide - suckers freely, so watch for those - this is said to be a "thicket forming" shrub, meaning it spreads via the suckers.

Compact shrub, eventual height - 1 metre. Suckers from the base. Happy as a border plant, alone or in groups or even a container.

Snap, Bamboo!

Thank you ladies. Some of the pics I have seen make it look really huge, but that sounds perfect for me. So I don't need to prune it then?

I will surround it with something to help prevent the suckers, I will probably cut the bottom off a large garden pot and push that into the ground

I had this plant and it's a great little shrub grown for it's lovely coloured foliage.
One thing i discovered living in quite a windy position (not a cold wind), is that it ruined the leaves .... being quite fine they got badly windburnt.
If you too live in a windy position maybe give it some shelter.

thanks for the tip Louise. Luckily where I intended to plant it is a relatively sunny spot but very close to the house and surrounded by taller shrubs so that should help protect it from most winds