Tun (unit) - Wikipedia
https://en.wikipedia.org/wiki/Tun_(unit)
Web ResultThe tun (Old English: tunne, Latin: tunellus, Medieval Latin: tunna) 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. The modern tun is about 954 litres.
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