Barrel (unit) continued to use the same size barrels. In the worldwide oil industry, an oil barrel is defined as 42 US gallons, which is about litres or 35 imperial gallons. Oil companies that are listed on American stock exchanges typically report their production in terms of volume and use the units of bbl, Mbbl (one thousand barrels), or MMbbl (one million barrels) and occasionally for widest comprehensive statistics the Gbbl (or sometimes Gbl) denoting a billion. There is a conflict concerning the units for oil barrels (see ). For all other physical quantities, according to the International System of Units, the
English wine cask units the traditional English volumes are commonly used in the wine and wine cooperage industries. Examples include a hogshead of , a barrique of (Bordeaux), a barrel of (Australia), a barrel of (Burgundy) and a puncheon of . The tun (, , Middle Latin: "") is an English unit of "liquid volume" (not weight), used for measuring wine, oil or honey. Typically a large vat or vessel, most often holding 252 wine gallons, but occasionally other sizes (e.g. 256, 240 and 208 gallons) were also used. In one example from 1507, a tun is defined as 240 gallons. The butt (from