The approximate size of the 3 liter oak barrel is 8″ from end to end and about 6 1/2″ in diameter. A 3 liter barrel is about 3/4 of a gallon. A 3 liter oak barrel will age? your liquor 15 times faster than a full size 53 gallon barrel. The 3 liter barrel would be considered a great size for someone that enjoys aging and wants to make a batch big enough to last a bit and maybe even share.? The size of the barrel head engraving will allow it to be viewed easily across a room but no be so big the barrel won’t fit on most shelves or bars without overtaking everything.? If you really want to step up to a real man’s size barrel our Dallas Barrel (5 liters) will be the one you want.? It is our most popular barrel we send to bars, restaurants and hotels.