Standard density we use is 100% - 120% on a single unit.

Our Hair Lengths
Our unit's hair length is measured from crown to end. Unless we specify otherwise (i.e. root to end; length from everywhere on cap). We are usually pretty generous with our lengths, but it all depends on the craftsperson of the unit. Nevertheless, you will always get at least the length you ordered. Everything else is "icing on the cake".