I had 10" on my old star and they were very comfortable, They were called Harley tallboy touring bars. I later had 12" and liked them a little better.
come to think of it, I am running 10" bars from a HD heritage on the star I have now. I love them. no need to change any cables or lines with the 10" bars. I may have had to re-route them though, I cant remember off hand.
with the 12" bars I had to change out the upper brake line.
Hd wide glide and Heritage bars are both 10" and can be found pretty cheap used on ebay.
Paul yafee bars are 2" taller than there stated size.
HD bars are pretty cheap and work great. You can see maybe 1/8" of the knurl on the inside edge of each riser.