M-- Waist circumference: 70-85 cm / 27.5-33.5 inch
L-- Waist circumference: 80-95 cm / 31.5-37.4 inch
XL-- Waist circumference: 90-105 cm / 35.4-41.3 inch
XXL-- Waist circumference: 100-115 cm / 39.3-45.2 inch
Standing in a relaxed position, measure waist at the level of navel (belly button). Do not assume you know your size. Do not select by pants size.

Features:
1.【FORGET YOUR BACK PAIN】If you suffer from back pain, you may find it harder to go up stairs or lift heavy objects and may also experience tingling and numbness. This can be frustrating when pain interferes with your quality of life.Lower back support offers better balance and posture and protects our back from injury when lifting heavy objects, yard work.
2.【4 SUPPORT BELTS FOR FULL SUPPORT】Back brace comes with a removable bionic spine large area of aluminum supports and 4 support belts. It fasts lower back pain relief, back strains, arthritis, relieves sore and aching backs/muscles, forget the pain from a herniated disc, sciatica, scoliosis and help maintain posture correct.
3.【4 SIZES EXACTNESS BACK BRACE】Back support belt with upgraded high-density velcro fasteners, allowing you to adjust the different levels of compression. Back support more precise dimensions guarantee a better fit for the waist of men, women, young or elder, please use a soft tape to double-check your belly circumference(Not Waist).
4.【PREMIUM BREATHABLE FABRIC】You want to be as comfortable as possible, especially if you sweat a lot in sports where you know precisely what it feels like to wear non-breathable fabrics and you can try breathable fabrics with eyelets. Breathable, lightweight, and washable quality materials that the back braces for lower back pain use are made, back support belt is comfortable and not sultry even when weight workout, golf, running, losing weight, and all kinds of exercises.

Packing List
1 Piece * Waist Support Belt