To measure yourself for a ladies' jacket, you need to measure your:
1- Bust around the fullest part
2- Waist around the narrowest part
3- Sleeve length from where the sleeve begins at the shoulder to the length you would like
4- Shoulders across your back.
Once you have these measurements, you should be able to work out the size you need by consulting the size chart of the label you are buying from. Depending on the fit you would like, and where you are buying your jacket, you may want to know your ‘jacket bust size'. This is usually done by adding 4 inches to your bust size.