Oprah's hairstylist Andre Walker described the four hair types in his 1997 book . . .
Type 1 - straight hair
Type 2 - wavy hair
Type 3 - Curly hair
Type 4 - Overcurly to kinky hair
Type 3 and Type 4 can have smaller categories based on the diameter of your curl pattern.
If you are unsure of whether or not you are type 3 or type 4, then your frequency of your relaxer touchup can help. If you are relaxing every three to five months then you are probably Type 3. If you can barely make it to 8 weeks before you are past due for your relaxer touchup, then you are probably Type 4.