Curls and waves are a very important feature of the hair system. It must be clearly declared when you place an order. The following accurately shows the available curl specifications 
 
Understanding how to choose and apply the correct level of hair wave or curl in your hair system can make all the difference in achieving a completely undetectable appearance.
 
Other factors that may affect your wave/curl selection
Also, the hair colour has a profound, direct influence on how far the wave or curl will open. Darker hair will not open or loosen as much as a lighter hair. As a result, the finished curl will vary depending on the hair colour.
 
The black family will not open as much as the browns. As for the blonds and reds, we don’t recommend curly hairstyles because of degradation to the integrity of the hair during the perming process.
 
If you must have curl in your red or blonde shades, we recommend following the matrix below
 
Wave/Curl Guide
 
TIGHT Afro 2mm

MEDIUM Afro 4mm

LOOSE Afro 6mm

TIGHT CURL Curl 10mm

MEDIUM CURL 13mm

LOOSE CURL 15mm

TIGHT WAVE 19mm

MEDIUM WAVE 25mm

SLIGHT WAVE 32mm

STRAIGHT