A glance at backpack policies in place for various sports leagues across the globe:
All-England Club, Wimbledon — Bans backpacks larger than 16x16x12 inches.
English Football Association — Bans "large" backpacks; no specific measurements.
FIFA — Bans 'unwieldy' objects from stadiums, which includes backpacks larger than 10x10x10 inches.
Manchester United — "Not advisable" to bring bags into stadium but all bags will be checked.
MLB — Policies vary from team to team. San Francisco Giants and Boston Red Sox are scanning bags with a metal-detecting wand. Most teams allow small backpacks.
NBA — Varies by arena. Some teams — Golden State, for instance — prohibit backpacks. Others allow small bags.
NCAA — Varies from school to school. Examples: University of Texas prohibits bags larger than 9x9x15; University of Florida bans all backpacks.
NFL — Policies vary from team to team, with most teams allowing small backpacks in stadiums. The league enacted enhanced security guidelines for fans attending the draft this week; backpacks were prohibited.
NHL — Also varies by arena. Some teams, for instance the New York Islanders, don't allow backpacks. Others, like the Detroit Red Wings, ban 'oversized' bags and search all bags that are allowed in.
Roland Garros, French Open — No bags bigger than 16x16x8 inches.