To choose the correct size for you, measure your body as follows: Length - Measure from the most noteworthy place of the shoulder crease to the base trim of the piece of clothing's. Shoulder - Measure the shoulder at the back, from one edge to another with arms loosened up on the two sides. Chest - Measure around the body under the arms at the fullest part of the chest with your arms loose at the two sides. Note - the size of the garment may vary by 0.5 inches from the mentioned measurements.