Jersey Mike’s subs come in three main sizes, measured by length:

  • Mini: about 5 inches long
  • Regular: about 7 inches long (sometimes described as 7–7.5 inches)
  • Giant: about 14–15 inches long, roughly double a regular and bigger than a typical 12-inch “footlong”

In practice, employees and fans often explain it as the roll being around 15 inches total, with the regular using roughly half and the mini using a smaller portion, so a Giant is basically the full loaf, a Regular is half, and a Mini is a smaller, snack-sized version.