Kinky or Coily or Ringlet Curls, Extra Curly Hair has 3 types. 4A curls: Small, tight coils that start at the root and maintain texture throughout the hair. 4B curls: Very tight coils that sometimes form in a “Z” shape or zig-zag pattern. 4C curls: The tightest of coils that have a defined zig-zag pattern and a dense texture.