<page_title> Keg </page_title> <section_title> U.S. keg sizes </section_title> <table> <cell> 15.5 <col_header> Size (US gal) </col_header> </cell> <cell> Half Barrel / Full Keg <col_header> Also known as </col_header> </cell> </table>
A keg or half-barrel is 15.5 U.S. gallons.