Machine-Pre Made Lace Frontal Wig, the unit measurements are 4"x 6". Density: 150%, Lace Color: Transparent, Lace Size: 4x6,. Knots are not bleached. Our Transparent Frontal Wigs are Machine-Pre-Made Wigs using our premium bundles and our transparent lace frontal. These units are not styled or customized. They are packaged and ready for your stylist to put a personal touch on them.