Its the cap of human hair wigs, which is compositive of wigs cap color, size, style and material. We have transparent, light brown, medium brown, dark brown and black colors which are in common used for full lace wigs, also we can do different colors as per buyers request. Now we have 4 sizes cap for wigs, thats S, M, L,XL for different customers, also it can be produced according to buyers provided size of full lace wigs.
S: circumference: 52cm, front to nape: 34cm, ear to ear: 33cm
M: circumference: 54cm, front to nape: 35cm, ear to ear: 34cm
L: circumference: 56cm, front to nape: 36cm, ear to ear: 35cm
XL: circumference: 57cm, front to nape: 37cm, ear to ear: 36cm
As for cap style of full lace wigs, there are more than 10 kinds of different styles, which is up to buyers interest. The most 2 common used one is lace(front)+stretch net(from ear to ear)+lace(back) & lace(front)+stretch net(only at crown w/PU support)+lace(back). Measuring your head correctly is very important when ordering full lace wigs. Follow the measuring steps below, be sure to use a cloth measuring tape and to measure a minimum of three times. Your hair should be braided or wrapped as flat as possible.
Step 1 Circumference of wigs cap: Begin measuring by placing the end of the measuring tape in the center of your forehead. Then start to wrap it around the circumference of your head (in back of your ear, around the nape of your neck, then in back of your other ear) all the way to where the tape meets the other end. That will be the circumference.
Step 2 Front-to-Nape of wigs cap: Place the measuring tape at the front of your hairline, if you have a windows peak make sure to start it at the beginning of your widows peak. Then hold the other end of the measuring tape right at the nape of your neck. (If you are not sure where your nape is, bend your head back, and where your skin creases is where it should end.)

Step 3 Ear-to-Ear across hairline of wigs cap : Begin by placing the measuring tape where your sideburns end, then follow your natural hairline straight across your head to the other ear/sideburn.
Step 4 Ear-to-Ear over top of head of wigs cap: Place the measuring tape right by the tip of your ear where you hairline is across the top of your head to the other ear.
Step 5 Temple-to-Temple of wigs cap: If your temple area is extended, place your measuring tape where your hair extends the farthest on your hairline. Then wrap the measuring tape around the back of your head, to your other temple.
Step 6 Width of Nape of wigs cap: Place the measuring tape on the nape of your neck and measure from where your hairline at the nape begins and then ends.