BibleSocks have the perfect amount of stretch and are generally a "one size fits most". Simply put...Our MENS Socks are sized to fit a size 6-13 Man, or a 10-13 Woman.We've had them fit smaller feet, and we've had them fit bigger, King-Kong type feet.  We've even had some size 15-16 footers love these as well!  Our WOMEN/YOUTH Socks are sized to fit a 5-10 Woman or a 3-8 ManPerfect for the small footed man, and the wife of any age.Our KIDS Socks are sized to fit a 10-3 ChildFor your smaller and cuter kiddos.Of course, if they don't fit - just holler at us and we'll either hand sew you a new pair or find another sensible alternative to help you out.