The 13x4 HD lace frontal is a type of hair extension used for wigs, weaves, or ponytails that offers a natural-looking hairline and more styling versatility. 
 
Dimensions are 13x4
Size: The base measures 13 inches across the front and 4 inches from front to back. This allows for a wide area that can cover the front of the head.
HD Lace
High Definition (HD) Lace: This type of lace is thinner and more delicate than regular lace, making it virtually undetectable on the scalp. It blends seamlessly with various skin tones, giving a more realistic appearance.
Benefits
Natural Hairline: The frontal provides a natural-looking hairline that can be styled back or parted in different ways.
Versatility: With a 13x4 frontal, you can create various styles, such as updos, ponytails, or side parts.
Full Coverage: It covers a larger area than smaller closures, giving you more flexibility in styling
Overall, a 13x4 HD lace frontal is popular for its ability to create a natural look while offering ample styling options. 
Giving you the “SCALP” effect.