Using these eye shadow and eyeliner line template stickers is a breeze. First, pick the right sticker that suits your eye shape and size. Then, gently place it on your eyelid where you want to apply the eyeliner or eyeshadow. After that, you can use your favorite makeup products to fill in the area. If you find the sticker isn't in the right position, you can carefully re - adjust it. When you're done with your makeup, just peel off the sticker. Remember, keep these stickers in a cool and dry place to maintain their quality. Don't try to reuse them too many times as the adhesive may lose its stickiness. And always make sure your eyelids are clean before applying the stickers for better adhesion.