A 4x4 Lace Wig is a special piece of hair in which individual hair strands are tied onto a piece of lace. Closures come in different sizes where the most common are 4 inches wide by 4 inches deep. The sole purpose of the closure is to allow you to have a wig without leaving out any hair.   Types of lace closures There are many types of 4x4 Lace Closure in the market...