Product details:

Black Licorice Lip Plumper - Double-Lobed Style (Creates a cute dent on the lower lip) Works on both upper and lower lips together or separately Accommodates medium to full lips of two inches and above (M+ to L) If you have lip width of 2 inches and above measuring from corner to corner of the mouth and the thickness of the upper and lower lip is above 0.6 inch, use this licorice style. Tips: Use your credit card to measure your lip size. The height of a credit card is 2 inches. If your lip width is the height of the credit card and the lip thickness above a quarter of the height of the credit card, use this licorice style.