A lace frontal 13x4 refers to a specific size and type of lace frontal hairpiece. The numbers "13x4" refer to the dimensions of the lace frontal: The "13" indicates the width of the lace frontal in inches. In this case, it is 13 inches, which means it covers a significant portion of the front of the head, from ear to ear. The "4" indicates the depth or length of the lace frontal in inches. In this case, it is 4 inches, which means it extends 4 inches back from the hairline. CYhair has 3 types of laces to manufacture lace frontal 13x4 which is transparent lace, HD lace and Swiss lace. About parting, mostly it will be free part. Our Lace Frontal 13x4 is made from 100% human hair, look natural, thicker, sturdy, blends well with most hair weave.