A number rather buy larger ...

The vest falls from a little small. If you are not sure you should definitely opt for the larger version.
The vest itself is super processed and sits perfectly on the body. I've been wearing one week snowboarding and was pleasantly surprised. The freedom of movement is not restricted by the vest barely up. only while sitting in the lift you realize that you have the vest on.
Even the occasional crash survived the vest. You feel better protected especially in terms of collisions with others. Would never go back now without this vest on the slopes.