Keg Sizes:

Standard
European
Pony
Torpedo
Mini
Size
½ barrel 50 liter barrel ¼ barrel ⅙ barrel
Gallons
15.5 13.23 7.75 5.5 1.31
Bottles/Cans
165 140 80 55 14
Cases
7 6 .6
Liters
58.9 50 30 20 5

*Note: Bottles/cans refers to 12 oz. sizes, case estimates are approximate.