US Sizes	Chest (in)	Waist (in)	Hips (in)	Height (in)
4	21.5-22.5	21.5-22.5	33-35	38-41
5	22.5-23.5	22-23	23.5-24.5	41-44
6	23.5-24.5	22.5-23.5	24.5-25.5	44-46
6x	24.5-25	23-23.5	25.5-26	46.5-48.5

Chest: Place the tape measure under your arms at the fullest part of your chest, wrap around your body until your fingers meet and mark the measurement.
Waist: Measure around your natural waistline - right above your hips. Be careful not to squeeze too tight to allow a little give.