Gently wraps and pulls the shoulder blades together to support good posture. Gentle yet supportive. Thin, so it doesn't show under outerwear. S〜M size Shoulder width (approx.) 38〜40cm Height目安 (approx.) 150〜160cm Shoulder straps are adjustable. My middle school daughter tried it on over her shirt, but the size didn't fit, so I'm selling it. The box was torn when I opened it. Please check the photos.