Ideally you purchase your Posture Medic at a location where you can try it on.
• Posture Medic should not force you into position (too small)
• Posture Medic should not pinch or cause strain in your armpits (too small)
• You should be able to bend & twist your body and lift your arms like you normally would
• You should only truly notice the device when you are misaligned and feel the back plate as a reminder
If you are between sizes on the chart, choose the larger size