Size: (length * width (cm/inch)): S: 90cm*22cm/35.4inch*8.66inch; waist: 60-83 cm/23.6-32.6 inches M: 100cm * 22cm / 39.4inch * 8.66inch; waist: 77-93 cm/30.3-36.6 inches L: 110cm * 22cm / 43.3inch * 8.66inch; waist: 90-103cm / 35.4-40.5inch XL: 120cm * 22cm / 47.2inch * 8.66inch; waist: 100-113cm / 39.3-44.4inch XXL: 130cm * 22cm / 51.2inch * 8.66inch; waist: 110-123cm / 43.3-48.4inch 3XL: 140cm * 22cm / 55.1inch * 8.66inch; size: 120-133cm / 47.2-52.3inch 4XL: 150cm * 22cm / 59inch * 8.66inch; size: 130-143cm / 51.1-56.2inch 5XL: 160cm * 22cm / 62.9inch * 8.66inch; waist: 140-153cm / 55.1-60.2inch 6XL: 170cm * 22cm / 66.9inch * 8.66inch; height: 150-163cm / 59-64.1inch about that product: Due to its unique dual traction design, this special back support bracket is the most suitable while still maintaining the feeling of not being bulky or heavy. The inner shell is neoprene, which provides comfort, heat insulation and excellent support, with a non-elastic back sheet and wing supports along the back. The most important thing is the two elastic and stylish cross straps, which further press the neoprene fabric to the body for better support, while maintaining the flexibility of the sides, so that the wearer will not feel any discomfort. This efficient dual support mechanism can effectively alleviate back diseases such as sciatica, spondylolisthesis, muscle spasms and other back diseases, as well as pain related to back diseases such as intervertebral disc herniation. In addition, this belt will help reduce sports that involve sudden twists and bends; it is also recommended for people doing work related to lifting heavy objects. Material: polyester, spandex, neoprene pack: 1 piece * Blet lumbar support