Originally had the valknut on the arm (as you can see)..but felt it wasn't for me after a while, so got the koi to wrap around it. The Valknut was also shaded and given perspective (wish I could show it just on its own - it was just block black with no shading).
Koi took 4 sessions, each approximately 4 hours each.
Rudolph in Estonia (Tallinn) did it, and I'm still going back every couple of months to get it touched up (for free!) such is his level of service.
my left sleeve only took 14 hours in total and my right one about 20 hours,they both go from shoulder to wrist and wrap completely around,just seems really slow for a peice that size
I said approx - probably 12h in reality. 4 sessions - the first for the outline, the second for the fine lines and shading, the third for the dark block colours and the last for the valknut.