Thank you for viewing from among many! Using this Gardner belt makes things considerably easier. I purchased it from the official website this June. - Brand: GUARDNER - Product Type: Back Pain Belt - Size: S size 63~73cm (for children and very slim people) M size 74 ~ 83 cm L size 84 ~ 96 cm XL size 97~115cm - Package Condition: New, unused, unopened 【Product Description】 Firmly secures with just a light pull of the string. Corrects posture comfortably and immediately resolves lower back pain. Adjustable with one-touch ease using a pulley system. Improves posture, strengthens core through abdominal breathing, and prevents lower back pain. For those who have concerns about lower back pain, etc., or for those who want to moderately adjust and tighten the abdomen, you can work with peace of mind even in jobs that handle heavy objects. *Posture improves because the back straightens. Same-day shipping available. When shipping, the box is bulky, so to ship within 3cm, it will be without the box. Includes instructions.