It definitely does not run small. I returned the Large for a Medium and it's a perfect fit. I love North Face, they make a great product. 4 found this review helpful.

Are North Face parkas true to size?

The North Face generally fits true to size, so take your normal fit. If you're after a slightly baggy style or roomier fit, opt for the size up.

Should I size up in a parka?

When buying a winter coat you should always buy one that is one size too big. ... You don't want to be swimming in your coat, but you do want it to comfortably over the other layers you will wear under it when it is really cold. For most people buying their coat just one size bigger works out just perfect.