Above is the original sleeve pattern piece (>24" wide at hem) and cuff.
I made several slashes from the wrist up to the underarm and overlapped the slashes so the hem was about 17" wide, including seam allowances. I retraced the piece and got the sleeve you see below.
Another thing I didn't mention before is that I lengthened the cuff so the finished width is 2", and I shortened the sleeve to compensate for that.
Hope this helps!