Size Chart - Waist: Full back: S: 50 to 85 cm, 20 to 35 inches. M: 75 to 105 cm, 31 to 41 inches. L: 85 to 115 cm, 35 to 45 inches XL: 110 to 126 cm, 39 to 49 inches XXL: 115 to 130 cm, 43 to 51 inches (adjustable strap). Why choose our back corrector? 1. We specialise in protective equipment products and can offer you high-quality products and services in time. 2. The product is made of high-quality impregnation material and an aluminium plate, which is durable and wear-resistant. 3. The product has a 90 day *. If you have any questions, please contact us. Features: 1. Relieve the back pain of the shoulder and support the back of the body to relieve muscle pain and pain. 2. Poor posture, restore the upright waist, spinal curvature, hump, kyphosis, lordosis, kyphosis, winged shoulder blade to avoid adverse posture. 3. Steel plate design: Perfect fit on the back, can be extended and contracted when wearing to adapt to different bodies. 4. Comfortable to wear: You can wear it for a long time without feeling severe discomfort, so you can take it with you. Specifications: ☀ Colour: black ☀ Size: XXL (waist 110 - 130 cm) ☀ Applicable scene: Office, living room, outdoors. Suitable for students, offices, men and women. Note: 1. It is recommended to limit the time to 15 to 30 minutes when wearing for the first time, to allow the body to adjust the fit. 2. If you have any questions, please contact us first, we will give you a satisfactory solution.