Features: 100% brand new and high quality The Posture Aid Support is designed to help pull the shoulders back and straighten the Spine Retractable elastic strap It makes you a elegant beauty no matter you are walking or standing According to your own width of your shoulder， adjust the velcro in the back to the tightness most suitable to yourself Size: 16.7 * 12.7cm (For 4-12 years old) Color: We have several colors， we don't offer color choose， we will randomly send. Package Content: 1 x Back Belt