I really like how this comes in a variety of sizes, as pimples also come in different sizes. I use the small size the most, since I haven't had any huge pimples yet. I usually leave this on while I sleep, so for around 7 hours. When I woke up, I found the redness of the pimples faded quite a bit, they're usually still a bit pink but that's still pretty good. The size of the pimple also decreased and it's not as bumpy. I love how this patch is hardly visible in your skin, so you can still put makeup on top and no one would ever notice!