I bought a size S about 10 years ago, recommended by a shop. I only used it once in low mountains and it didn't fit, so I replaced it with a size M of the same model and have kept it ever since. It's not new, but it's in good condition. *Includes a backpack cover. According to the GREGORY website, the torso length (the length from the seventh cervical vertebra of the neck to the top of the pelvis) is 40-44cm for S, 45-49cm for M, and 50-54cm for L. By the way, I'm not tall, but I have a long torso (^o^) 【Brand Reliability】 Gregory is a highly regarded brand in the outdoor world. Especially for backpacks, durability and comfort are required, making it a reliable choice. 【Comfortable to Carry】 The back panel uses mesh material, which is breathable and comfortable even for long hours of use. Adjustable straps make it easy to fit to your body, and the design distributes the weight of the load. 【Stylish Design】 The turquoise color design has a stylish look that stands out in outdoor scenes. It's perfect for those who want to pay attention to appearance as well as functionality. - Brand: Gregory - Model Name: Jade - Color: Turquoise - Material: Mesh - Strap Type: Adjustable Thank you for viewing. Size...30〜45L