Fia's system is a hair typing system that isn't as popular in the black hair care world. This system expands on the system made popular by Andre Walker. I actually prefer it so I decided to share it here on What the Kink?! Enjoy!
Fia's Hairtyping System
by Ann-Sofie Henriksson
Contact information: ann_sofie_h [at] hotmail [dot] com
First classifier - Your curliness (or lack thereof)
The straight ones
1a - stick straight
1b - straight but with a slight body wave, just enough to add some volume, doesn't look wavy
1c - straight with body wave and one or two visible S-waves (e.g. nape of neck or temples)
The wavy ones
2a - loose, stretched out S-waves throughout the hair
2b - shorter, more distinct S-waves (similar to waves from braiding damp hair)
2c - distinct S-waves and the odd spiral curl forming here and there
The curly ones
3a - big, loose spiral curls
3b - bouncy ringlets
3c - tight corkscrews
The really curly ones
4a - tightly coiled S-curls
4b - tightly coiled hair bending in sharp angles (Z-pattern)
Second classifier - What (most of) your individual strands look like
F - Fine
Thin strands that sometimes are almost translucent when held up to the
light. Shed strands can be hard to see even against a contrasting
background. Similar to hair found on many people of Scandinavian
N - Normal
Strands are neither fine nor coarse. Similar to hair found on many Caucasians.
C - Coarse
Thick strands that where shed strands usually are easily identified
against most backgrounds. Similar to hair found on many people of Asian
or native American descent.
Third classifier - Your overall volume of hair
Put your hair in a ponytail with as much hair as possible in it. Don't
bother with the way it looks - the goal is to have most/all of your hair
in there. If it means it sits smack dab on top of your head, put it
Measure the circumference of the ponytail. If you have bangs and/or you
can't get all of your hair in there adjust according to how much of your
hair you have measured.
i - thin (less than 2 inches/5 centimeters)
ii - normal (between 2-4 inches or 5-10 centimeters)
iii - thick (more than 4 inches/10 centimeters)
If you are having difficulty determining the thickness of individual hairs, this might help:
Take a strand of hair from the back of your head. Roll the strand between your thumb and index finger.
Fine Hair -- Your hair is difficult to feel or it feels like an ultra-fine strand of silk
Coarse Hair -- Your hair feels hard and wiry. As you roll it back and forth, you may actually hear it!
Medium Hair -- Your hair feels like a cotton thread. You can feel it, but it isn't stiff or rough. It is neither fine or coarse