10 Meters in length, this pre inked black string will allow for precise measurement of your clients brows.  The 'ink' is more of a charcoal dust, so won't stain the skin but holds firmly until you wipe it off. 
Packaged in a white box, which was not a wise move by the designer.  
Please be aware these boxes do get a little bit charcoal dusty, but can be wiped clean.