I've done my research on the Women's heated jackets and sweaters and if you ride and are going to make this kind of investment I would do the research, check out YouTube. Just about every brand jacket, sweater, or thing layering jacket said they run small because its meant to be close to the body to keep your warm. If it wasn't, the item wouldn't keep you warm. I made the mistake of purchasing a Men's small Milwaukee Leather hoodie, too big on me and not close enough to the body so I can't feel all the heats. Also just about everything is made in China/Japan so it's going to fit smaller. This item on clearance for $119 is a steal, most are over $200. My Milwaukee Leather Men's hoodie sweater is a few years old and only the front is heated and because its a mans the length is not long enough for me so when I'm on the motorcycle my back gets cold. There is a measuring guide, use it, if its for a gift, measure one of the items in their closet. Stay warm out there :)