“A 3a curl pattern has a much looser curl than a 3c pattern,” she adds. Also, note that even these groupings have variations—2a curl patterns have a light wave, and a 2c pattern is closer to ...
which define the diameter of the curl pattern (A is the widest and C the smallest). For example, 2A means you’re rocking loose waves, 3C gives you tight curls, and 4B brings the coily vibes.