Hmm, interesting - I answered this part of your question under your previous posting...
If you just want the unpruned measurement, 600 x 600 cm

It can grow to 15 to 20 feet but you can copice down to a stump every 3 years , likes full sun slight shade but out of any cold winds makes the leaves go brown on the edges

Well drained soil but keep moist in the summer .

Gg

that's very helpful and interesting - thanks a lot!