FIG. 1 is a front, right perspective view of a hair curler, showing my new design;
FIG. 2 is a rear, left perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is an enlarged top plan view thereof;
FIG. 8 is an enlarged bottom plan view thereof; and,
FIG. 9 is an enlarged view of portion of FIG. 2 thereof.
The broken lines shown in the drawings illustrate portions of the hair curler that form no part of the claimed design. The dash-dot broken lines in the figures illustrate the boundaries of the enlarged view indicators and form no part of the claimed design.