These are a shop favorite with customers and staff!
From Deco Miami, because they said it best ;)
"Nail art just got way easier. These tiny stickers were made to be easy to remove from their sheets and press right onto your nails. They can be applied to gelled, polishes, or natural nails, just make sure that whatever surface you're putting them on is dry. Oh, and don't be a hero; use tweezers to remove stickers from sheets. They are thin, so take your time and be gentle. Application directions and tips are printed on the back of packaging if you need additional guidance. For best results, use a thick top coat to seal the sticker on your nail. You may need to put an extra coat overtop of gold metallic stickers."