Hair types are categorized into four main groups: Type 1 is straight hair, ranging from fine and thin (1A) to medium thickness (1B) and thicker (1C). Type 2 encompasses wavy hair, from loose S-shaped waves (2A) to more defined S-pattern waves (2B) and thicker waves that may border on curly (2C). Type 3 includes curly hair, from loose, well-defined curls (3A) to tighter ringlets (3B) and dense, corkscrew curls (3C). Type 4 is coily hair, ranging from tightly coiled S-pattern curls (4A) to...
