This jacket runs a little small and long in the arms, which was perfect for me. I'm 5'10 125 lbs and I was able to order the small and it is almost long enough in the arms. Since usually nothing that fits is long enough, I was impressed. I'd say size small is a size 2 vs a 4, so adjust accordingly. Soft leather, very well-made, and it came out of the bag ready to wear. Favorite leather jacket ever! Great for cool to cold but not really cold temps.