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 just for your reference.

Normally people like the density 80%  100% for full lace wig lace front wig

1¡ª50%                                                                2-- 80%

3¡ª100%                                                             4--130%

5¡ª150%                                                             6-- 180%

or You can tell us the different density in different area. Show as below :