A cigarette is a product consumed through smoking and manufactured out of cured and finely cut tobacco leaves and reconstituted tobacco, combined with other additives then rolled or stuffed into a paper-wrapped cylinder (The length varies from King Size (84 mm) to superslims (120 mm) ). The cigarette is ignited at one end and allowed to smoulder for the purpose of inhalation of its smoke from the other (usually filtered) end, which is inserted in the mouth. They are sometimes smoked with a cigarette holder. The term cigarette, as commonly used, refers to a tobacco cigarette but can apply to similar devices containing other herbs, such as cannabis. Cigarettes are dangerous and the smoke of cigarettes contains tar, carbon monoxide and other poisons. Heavy cigarette use causes cancer, emphysema, tar buildup, yellow and rotten teeth, smell, and harm to those around you.