Abstract: An adjustable height gauge for use in hair cutting. The gauge is worn on the thumb, much like a ring, and includes a platform of adjustable height that supports the index finger of the same hand. The index finger and middle finger are used to grasp a section of hair and then the gauge is placed under the index finger in contact with the scalp and hair extending beyond the fingers is cut off. This device allows a person to cut his or her own hair by feel to any desired series of lengths for shaping and grooming.