Is the NW0 hairline really where the creases on your forehead stop?

[indie85]

It's been so long since I've had a teenage hairline, I've forgotten exactly what my goal should be. Can any NW0s chime in and say if they've got some skin that doesn't crease before their hairline begins?

 

[baba_yaga]

width of 4 fingers (excluding the thumb) from touching eyebrows to touching the hair line.