I guess my hair length would be medium(3-4 inches). I think my current piece(my first one), the density could be lower. The main issue is the front where it's just a wall of hair(non graduated order), and the rest of the piece is quite dense too(sent it back to have more hair added, my stylist thought it wasn't enough initially). It's more hair than I have ever had in my whole life probably. Even when I part the hair, the scalp show is very minimal. My mom and younger sister have more scalp showing! But I'm 21 with ok side and back hair, and with my hairline covered completely it looks ok. But I like to expose my hairline most of the time so it kinda sucks right now. I'm waiting for my own hairline to grow back to 3-4 inches since I had it shaved initially for cut in, should've tried to use it. And the difference in density between the natural hairline, and the system behind it is completely obvious.