After reading the reviews that claimed the waist on this might be snug, I decided to go with a little larger of a size than I normally would have.... which, it turns out, I didn't need to do.

I wear a medium, but normally purchase a large in jackets like this so that I can layer comfortably. I ended up getting an XL in this, but could have comfortably gone with a large with plenty of room to spare. I think this depends on your waist/hip ratio and body shape. If you are apple or pear shaped this might not be the jacket for you... but this will be perfectly suitable for hourglass figures or even straight.

Still, it's a quality, lightweight jacket that can certainly be modified with warmer layers for cooler temps.