The back length completely covers my hind end and perfect for outdoor activity in cooler weather. I debated on Small or Medium and glad I purchased the Medium otherwise it would have been too snug for the chest area, and definitely too small for layering. Hip area seemed true to size. The only negative is that the arm length is too short to comfortably use the thumb holes. If you have average to longer arms and want to use the thumb holes, this might not be a good choice.