Choose the fit size fake nails for your fingernails is the key to keep them for long time. making a nail that doesn’t fit the arch, aka apex, of your nail will make it fall off too soon—if it even lasts. Sometimes it's easy to get caught in the hair. I suggest sizing up the actual nail and tapering the sides down to fit.
In summary，"When you want to wear false nails，always make sure you clean your nails with alcohol before applying your press-on nails and add a healthy amount of nail back adhesive to your nails to make them last longer." With good application and proper care, press-on can last up to 12 days, adding that missnail generally last anywhere from six to nine days.