XS--  Suit for Chest Width: 55-70 cm / 21.65-27.55 inch Suit for Height: 110-140 cm / 43.3-55.11 inch Suit for Weight: 25-40 KG S--  Suit for Chest Width: 70-85 cm / 27.55-33.46 inch Suit for Height: 140-165 cm / 55.11-64.96 inch Suit for Weight: 40-60 KG M-- Suit for Chest Width: 80-95 cm / 31.49-37.4 inch Suit for Height: 160-175 cm / 62.99-68.89 inch Suit for Weight: 60-80 KG L-- Suit for Chest Width: 95-110 cm / 37.4-43.3 inch Suit for Height: 170-185 cm / 66.93-72.83 inch Suit for Weight: 80-90 KG XL-- Suit for Chest Width: 105-120 cm / 41.33-47.24 inch Suit for Height: 180-200 cm / 70.86-78.74 inch Suit for Weight: 90-110 KG Functions: 1. Muscle pain relief: The coronal and lumber section of the frontal plane maintains the gravity balance of the body, reduces the burden on the muscles, corrects and relieves pain, and bad postures would cause sore necks and shoulders, and even headaches 2. The role of protection: Wearing is comfortable and breathable, can be applicable to all including men and women, young and old, it can play a good role in correcting the back.Applicable to those workers with pain in back and shoulder due to the long time standing, sitting or keeping of the same posture 3. Easy to adjust and wear: Universal size, easy to wear, without any help, you can take off and wear a pose corrector by yourself