23.5...... Damn!
Anything bigger than a 12 is too big. My biggest kite for the last 2 years has been a 12 and last year was a 10 although I spent most of my time on the 7 Halo. Anything bigger than a 12 is too slow for wave riding. The biggest kite our rental centre will stock this year will be our 14 m Flow. But to be fair, it probably has the bottom end of a 16 but is user friendly and fun.
Buying a 23 metre kite, it would be cheaper to move to WA

Good winds,