A blunt is a cigar

Cigar

A cigar is a tightly-rolled bundle of dried and fermented tobacco that is ignited so that its smoke may be drawn into the mouth. Cigar tobacco is grown in significant quantities in Brazil, Cameroon, Cuba, the Dominican Republic, Honduras, Indonesia, Mexico, Nicaragua, Philippines, and the Eastern...

 which is wider than a cigarillo

Cigarillo

A cigarillo is a short, narrow cigar. Unlike cigarettes, cigarillos are wrapped not in paper but in whole-leaf tobacco. Cigarillos can be found for purchase alone or in packs, and are often made without filters...

 and not quite as wide as a Corona

Cigar

A cigar is a tightly-rolled bundle of dried and fermented tobacco that is ignited so that its smoke may be drawn into the mouth. Cigar tobacco is grown in significant quantities in Brazil, Cameroon, Cuba, the Dominican Republic, Honduras, Indonesia, Mexico, Nicaragua, Philippines, and the Eastern...

. These cigars typically consist of two main parts; the inner leaf, which is similar to a cigarette

Cigarette

A cigarette is a small roll of finely cut tobacco leaves wrapped in a cylinder of thin paper for smoking. The cigarette is ignited at one end and allowed to smoulder; its smoke is inhaled from the other end, which is held in or to the mouth and in some cases a cigarette holder may be used as well...

 rolling paper, except it is made of tobacco

Tobacco

Tobacco is an agricultural product processed from the leaves of plants in the genus Nicotiana. It can be consumed, used as a pesticide and, in the form of nicotine tartrate, used in some medicines...

, and a thicker outer leaf which is rolled around the inner leaf in a spiral. In most commercially available blunts, the "leaves" are not actual tobacco leaves but rather paper made from tobacco pulp.

Blunts originally got their name from their 'broad or rounded tip', and were named as such in the 19th century to differentiate them from other cigars with a tapered, pointed tip. Blunts are a specific size cigar that have been so popular as to have been once sold in specific vending machines. The original blunt cigar was manufactured in Philadelphia out of a single leaf outer tobacco wrapper. At the time this was the only cigar wrapped in one continuous leaf, other cigars used pieces of leaves for their outer wrapper. Tobacco leaves naturally taper at the ends. Since this cigar was rolled in one leaf the end would taper and had a round appearance (thus leading to the Blunt name). Due to the popularity of this style of cigar many other Blunts were launched into the marketplace. Older brands of blunts include: Phillies, Dutch Masters, King Edward, Pom Pom, White Owl, El Producto, Back Woods, Swisher Sweets, Optimo, El Rey, Arturo Fuente, Romeo Y Julietta, John T's, Flor de Dominicana, Tampa Nugget, Don Rex, Don Tomas, Don Lino, Garcia Y Vega, and Games.

Over time the term Blunt came to describe any cigar wrapped in a single continuous leaf. However in the 1970s a new manner of producing cigars was invented. This manner is known as Spiral binding. No longer did cigars have to be rolled in a continuous single leaf but instead a continuous spiral wrap from base to tip could be employed. The basic shape of a Blunt remained unchanged although the burn characteristics of a spiral wrapped cigar is not the same as a single continuous leaf. However spiral wrapping is much less expensive than using a full single tobacco leaf. Spiral wrapping gives a better seal than a single continuous leaf as overlapping can be done (much like wrapping an arm in a bandage, spiral wrapping is easier to seal than a single continuous bandage).

Individually packaged Blunt leafs have been available for many years. These are tobacco leaves that because of their nature and appearance are used to roll a cigar in one continuous sheet (thus the name Blunt is used). The United States Tobacco Taxation Board has classified all individual cigar wrappers as "Blunts" and taxes them as roll-your-own tobacco. Many US States classify Blunt Wraps as tobacco and a license is required to sell them and collect tax. Canada defines a Blunt Wrap as "a sheet or tube made of tobacco used to roll cigarette tobacco in - similar to rolling paper". Use of these single continuous sheets is closer to the original Blunts of the 19th century since it is not a spiral wrap.

A "blunt" may also refer to a cannabis

Cannabis (drug)

Cannabis, also known as marijuana among many other names, refers to any number of preparations of the Cannabis plant intended for use as a psychoactive drug or for medicinal purposes. The English term marijuana comes from the Mexican Spanish word marihuana...

 cigar where the wrapping is a tobacco

Tobacco

Tobacco is an agricultural product processed from the leaves of plants in the genus Nicotiana. It can be consumed, used as a pesticide and, in the form of nicotine tartrate, used in some medicines...

 product. The leaf of a spiral wrapped cigar is moistened (usually with saliva) and removed. The cigar is then cut and the tobacco

Tobacco

Tobacco is an agricultural product processed from the leaves of plants in the genus Nicotiana. It can be consumed, used as a pesticide and, in the form of nicotine tartrate, used in some medicines...

is removed and discarded. The process of taking the tobacco out of the blunt is referred to as "gutting the blunt". The cannabis is then rolled in the paper and the leaf is hand rolled back on to the cigar.
An alternative method is to cut the cigar length-wise (including the leaf) and use the paper and leaf as a wrap for the cannabis.