Create a part starting from the tip of the left ear, over the crown, to the tip of the right ear. Secure the hair falling below the part in place by twisting sections and pinning. Create a center part on top of the head, starting at the crown, moving forward to the forehead. Keeping the parts intact, secure the top hair in place by twisting and pinning.
Remove any hairpins at the back of the head. Draw the wide-tooth comb through the hair, moving from the crown, downward to the nape of the neck. Hold the hair taut to the desired length. For a super short bob, cut the hair evenly at the nape at a length reaching 1 inch below the earlobes. For a slightly longer bob, allow 2 to 3 inches below the nape. Use the comb as a guideline and cut horizontally along the point where the hair and comb intersect.
Remove the hairpins from the left side of the head. Start at the crown and draw the comb downward toward the ear. Again, hold the hair taut at the desired length. Match the length on the left to the length in back. Stop cutting when you reach the left temple. Repeat this step on the right side of the head. Check for any strays or uneven cut lines.
Part the front section of hair horizontally starting at the left temple and moving over the head to the right temple. Use the comb for a benchmark to create bangs on the forehead. For sideswept bangs, angle the comb so the left end of the comb rests on the left side of the forehead at the eyebrow. The right end of the comb should rest on the upper jawbone. Cut the hair, with the scissors facing upward, along this benchmark.
Consider cutting the hair an inch longer than the desired length when nerves or confidence may be an issue. Cutting more hair is never a problem, but regrowing hair to cover up a goof takes longer.
Take your time. Avoid injuring your body and appearance by allowing yourself enough time to make the ends even.