A 13x4 Lace Front Wig, also called 13x4 closure, is a hairpiece made of lace closure and hair hand-tied in it. The size of the 13x4 lace frontal 13-Inch across and 4-Inch back. It is covered in the front of the head, always be used with hair bundles, to full fill the head and show a more natural hairline. Before answer this question, we should consider some things that will affect the answers. So, let’s analyze them one by one: 1.LENGTH: All bundles weight approx. 100 grams. The longer the length of your Lace Front Wigs , the more hair you're going to need. Mslynn Suggests more than 3 bundles if using hair over 22” for a fuller look from root to tip. 2.TEXTURE: If you were considering a short bob with silky Human Hair Lace Front Wigs , two bundles and closure are more than sufficient. However, if you wanted an extremely thick bob, you would need 3-4 bundles but if looking for a longer bob perhaps shoulder length with extreme fullness an extra bundle would get the job done. 3.SIZE OF YOUR HEAD: Most head circumference is 21”- 24” inches.Whether your head is bigger or smaller you'll need to adjust the number of bundles you purchase to accommodate that. In the US and UK, the average size of a woman's head is 22.5". 4.FRONTAL OR CLOSURE: Closures come in several sizes the most common being 13x4, 13x6, 4 x 4, and 5x5 inches. Not only 13x4 lace front, any style you are considering will need to use a minimum of two bundles with your frontal and closure. TIPS FOR YOU 13x4 lace frontal with bundles are always chosen by the black beauties, so whatever you wear them often or occasionally, we advise you to choose real human hair textures. Because the hair is sewed in the lace by hand and it will be installed in the front of the head, so real human hair lace frontal will show a more natural hairline. And it will be used for a longer time than other materials with proper tend and protection. I hope you have found this guide useful. If you need any more help just let us know either by visit www.mslynnhair.com