A joint ( //), which is commonly referred to as a spliff, "doobie" or "doob", is a rolled cannabis cigarette. Unlike commercial tobacco cigarettes, the user ordinarily hand-rolls joints with rolling papers, though in some cases they are machine-rolled. Rolling papers are the most common rolling medium in industrialized countries; however, brown paper, cigarettes or beedies with the tobacco removed, receipts and paper napkin can also be used, particularly in developing countries. Modern papers are manufactured in a range of sizes from a wide variety of materials including rice, hemp, and flax, and are also available in liquorice and other flavoured varieties.
Joint size can vary, typically containing between 0.25 and 1 g (1⁄112 and 1⁄28 oz) net weight of cannabis. Tobacco is sometimes used in the rolling process.