Combined with dietary restrictions, I lost 10 kilograms in weight by training while wearing this belt. While it doesn't guarantee weight loss, I recommend it because the inside is made of rubber, which makes you sweat a lot around your abdomen. I only wore it over a shirt, not directly on my skin, and it has been home-cleaned. There is a slight indentation on the inside rubber part, but I don't think it's very noticeable. Length: Approximately 101cm Adjustable with Velcro Width: 19.5cm Please purchase if you understand that this is a used item.