Don't forget, leopoldii doesn't exist anymore! Its C. tigrina now.
The flowering growth is 15" tall, I know they get much taller but this is first flowering.
I also have a super dark leopoldii that has growths at 19" tall.
Yes I know that they are all suppose to be tigrina now but I am old school, been growing since the 1970's. So I still call them by the name I first learned.