I was about to answer your post shortly after you posted it - untill I saw some of the answers, and realised you were NOT in search of a small kite with huge jumps
But a huge 15m2 kite with medium jumps instead.
My mistake - I read the title as "being able to jump 15m high" with good hangtime too, and as you wrote you only got really big kites (9 and 11 and 21m2) I thought you wanted a normal (wave)sized or even a small sized kite, like 5-6-7m2, for 15m high jumps
A bit off the topic maybe - but how come the term "15m" is used about a "15m2" kite ?
Is this only in US, or ?
Very confusing IMO
Or simply lazyness, easier to say "fifteen meter" than "fifteen squaremeter" ?
We got the same erroneously term here in Denmark, regarding windspeed, where many use a wrong and completely reversed unit because it is easier and more "smart" to say
PS: Sorry, I am "damaged", being an engineer, I know...