Belt by Diesel, Secure your style, Adjustable length, Pin-buckle fastening, Single keeper, Belt fits true to size, Please buy in your normal trouser size. Founded by Renzo Rosso in 1978, Diesel has since become a part of global youth culture, with its pioneering new styles and creative design methods. Known throughout the world for their jeans, Diesel now boasts a full clothing and accessories line that embraces the label's inimitable laid back style.