probably 40 US gallons, which is 320 US pints, or about 266 UK pints, or about 152 litres
It depends where they came from. 225 litres is common for French wine barriques, bourbon barrels can be smaller but those from sherry makers can be bigger.
@peterh started
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It depends where they came from. 225 litres is common for French wine barriques, bourbon barrels can be smaller but those from sherry makers can be bigger.