I got the Small-X-Large size, and it fits great on my 3XL jacket. Make sure that your jacket will match properly with this hood's snaps; my jacket is a Washed Duck style, but some of the other reviewers may have had a different style that caused some of their alignment issues. My snaps were all good to go and fit properly and snug. The color matches perfectly. The hood is pretty rigid; you can move your head around and it will stay in place instead of following (at least it does that while it's new).