Thank you for viewing from among many options! 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 back pain concerns. Adjustable with one-touch ease using a pulley system. Improves posture, strengthens core through abdominal breathing, and prevents back pain. For those who have back pain or other concerns, or for those who want to moderately adjust and tighten their abdomen, it allows for safe work even when handling heavy objects. *Posture improves as the back straightens. Same-day shipping available. When shipping, the box will be bulky, so to keep it within 3cm for shipping, it will be sent without the box. Includes instructions.