noun
foot circumference
A measurement around the foot, used in shoe fitting and sizing. Often seen alongside 足長 (foot length).
See also: 足長 (そくちょう)
靴を選ぶときは、足長だけでなく足囲も測ってもらうといいですよ。
When choosing shoes, it's good to have not only your foot length but also your foot circumference measured.