All sets are made with GEL nail polish. These nails are reusable, if you take it off right. For instruction, please message me Each set comes with 10 handmade press on nails, a mini file, a mini buffer, a cuticle stick. 1. Measurements Please measure your own nail and find your size from our picture guide. We totally can do custom size as your request, just help us to add your nail size in mm or your nail tips number, we will process accordingly without any extra charges. Message me if you are unsure about the size/length. We DO NOT accept cancelation for sizing/length problems. If you're not for sure about your measurements, go up on the size because you can always file them down after. 2. Customization All of my nails are hand-painted, so any new ideas and customization are available. We can even create a whole new set together, so please don't hesitate to message me 3. Refund/Return/Send Product Back Ami Nails House take full responsibility for production mistake. If we send you the wrong set/size/color, we would gladly issue you a refund or send you a whole new set for free. Please consider sending a message for us before adding a negative review if you can! We do not accept cancelation for sizing/length problems. Please double check your shipping address, as we cannot change it once we shipped it