what size is the nfl football

GREEN BAY, WI — Fans packing Lambeau Field on a chilly December night had one burning equipment question before kickoff: what size is the NFL football? That 11-inch-long, 22-inch-circumference prolate spheroid would define every spiral, drop, and contested catch as the Green Bay Packers held off the Chicago Bears 27-20 in a Week 15 NFC…