See more product details The Most Frequent Questions: 1. Does the posture corrector fit for kids? Answers: YES. It fits for kid and children. For kids, please choose Size Small. 2. Can I wear the brace under the shirt? Answers: YES. The posture brace is made of high quality material. It is skin-friendly, soft, breathable and comfortable. 3. How long does it take to improve the posture? Answers: There will be improvement in about two weeks. Start by wearing it for 20-30 minutes, begin to progressively extend the amount of time spent wearing it by 5-10 minutes and increase to 1 hour a day. The posture trainer definitely helps with posture, more to remind you to sit correctly than it does to physically straighten. During the correction process, please remember to maintain a good posture and increase exercise.