Question: what size are acupuncture needles?
Answer: Acupuncture Needle Size Acupuncture needles have an average diameter of 0.00325 inches. That's like a strand of hair. They also come in three sizes of length: 0.5, 1, and 1.5-inch needles. I use a 0.5-inch for ears, 1-inch for the face, hands and feet, and 1.5 for the leg and larger muscle groups.