A lace closure typically comes in 4 X 4 inches in size and is used to close off your wig or a particular style. They are available in many different styles which include the three-part, free part, and middle part. Three-part closures allow you to part the hair in three different ways while the middle part closures only give you one style option. Free part, however, let you part your hair however you wish to. A free part closure hairpiece is more preferred because of the versatility it offers.