It is basically everything I wanted. Seems to fit right (can't tell 100% on the length since I'm wearing relatively high rise wool pants...) and the lamb is nice and soft. I had hoped to get some hides with very little visible veiny texture and that is definitely the case on this jacket. Can't wait to wear it for real
I'm 5'9 and my moto has 24 inch sleeves. could be anywhere from 23-26 inches depending on your proportions.
But honestly it's a pretty simple measurement - measure down from the point of the shoulder to about the first knuckle of your thumb. alternatively, measure a jacket sleeve that you already have and add or subtract to your liking.