We do not advise or address sizing on jackets on our blog, as sizing inquiries can become extensive in questions for the different styles. Also when we are very busy we always do not get to reply to the blog inquiries daily as we are replying to the email inquiries first.
We are more then happy to help you with your sizing inquiries by contacting our customer service with an email. Please include in your email the jacket style you are interested in and measurements. Measurements should include chest, sleeve, waist and height. Our 750W is in actual women's sizes not graded sizes such as small and medium which can be 6/8 for small to 10/12 for medium in sizing.