It is difficult to define the density,because the density depends more on the hair length,wave,curl, color and so on.Density below is only for your ref.
Normally, people like the density 80%,100%,120% for lace front and full lace wigs.
1-50% very light density
2-80% light density
3-100% light-medium density
4-120% medium density
5-150% heavy density
6-180% heavy heavy density
Or you can tell us the different density in different area shown as below
