Follow this guide to find your measurements. If you have questions just ask, but do remember, clothing is not made to measure. This is a guide only to help you choose then closest size possible. Alterations might be necessary to any garment you order.
For further reference:
Bust is measured at the fullest part across your breasts
Waist is measured at the smallest part of your torso, you can also bend sideways and where your side creases that is your natural waist. It is not typically in line with where you wear pants.
Hip is measured at the fullest part across your bum and hips, approximately 8-9” below your waist.