These are Nail Decals not Nail Stickers.
Nail Stickers & Nail Decals do the same thing except the instructions are different.
Nail Decals Instructions:
Paint your nails with a nail polish of your choice and let them dry completely.
Cut out the Nail Decal using a pair of scissors.
Place Nail Decal in a shallow dish of water for 10-15 seconds. After soaking the Nail Decal in water, slide it off it's white backing
Finally, place the Nail Decal onto your nail and seal it in with a clear top coat polish. Do NOT seal in with clear acrylic as the monomer will dissolve the decal.
Nail Decals are more fragile than Nail Stickers but are a great affordable option to get the same results as Nail Stickers. And you can definitely make them work just as good as Nail stickers. Simply make sure you seal them in with a generous layer of top coat and don't forget to seal in the free edge to make sure the decal is nice and protected.This product has no specific sizes