Here is a handle I have for sale. It is a piece of crushed velvet Koa from Mark at Burl Source.
I used some brass spacers to break up the Koa and too give the appearance of there being a ferrule and an end cap.
I like slender handles and I would not hesitate to put this on a 240mm knife but it may be more appropriate for a 210 or even a 190mm nakiri or santoku.
I am asking $120 shipped or $135 If you would like it mounted.
Thanks for looking.