Curvature shapes used in hair design include:

• A. Oblongs
• B. Circles
• C. Diamonds
• D. Triangles

Answer: (A)

Curvature shapes describe the base form around which hair is set, shaping how the curl bends and the line of the finished wave. An oblong base gives a longer, oval area for the hair to wrap, producing elongated curls or waves with a smooth, flowing line. This makes the curl feel more natural and versatile for different lengths and face shapes, offering gentle lift without a tight, rounded look.

Circles create round, compact curls with more volume and a tighter radius, which isn’t ideal when you want a long, sweeping curvature. Diamonds and triangles produce more angular or directional patterns, which can look sharp or segmented rather than as a soft, continuous curve. For achieving the extended, soft curvature typically intended in hair design, the oblong shape is the best fit.