1a– Straight (fine). Hard to hold a curl, tends to be oily, hard to damage.
1b– Straight (medium). Has much body (i.e. more volume, more full).
1c– Straight (coarse). Hard to curl (i.e. bone straight).
2a– Loose waves. Loose "S" pattern. Hair sticks close to the head.
2b– Defined waves. A bit resistant to styling. Defined "S" pattern.
2c– Wide waves. Resistant to styling. Hair tends to be frizzy.
3a– Loose curls. Thick and full, definite curl pattern. Much body.
3b– Tight curls. Medium amount of space in the curls.
3c– Corkscrew curls. Very tightly curled in corkscrews.
4a– Defined kinky/coily. Has a tight, very defined O-shaped pattern.
4b– Z coil. Tightly coiled, less defined. More of a Z-shaped pattern.
4c– Tight coil. Very tight O-shaped coils that don't form a defined larger patte