Saw a tutorial with these from the makeup chair and thought is try them.
Wow.. They are easy to use and give you the perfect liner or smokey eye. They are not sticky but go over your eye and then you use a eyeshadow to fill the gap. I found it better to use a smaller eyeshadow brush to get in the corners them once removed would tighten the line which a cotton bud and top up with eyeshadow if needed, or use a liquid or gel liner for a more defined darker look. This works with the top/bottom and cat liner stencil.
The smokey eye stencil is just as good but you need more time with this as you need to blend it out with a blending brush (I tend to use a lighter brown to do this.
Price is great and they come in a cute little pouch with step by step instructions. Plus they ship to the UK, including postage cost me £14.