These nails are press-ons. The set comes with glue, nail file and cuticle pusher. If you are uncertain of your nail sizes, it is suggested to order the trial sheet.Set Sizes come as follows: Large: 0/4/3/5/7Medium: 1/5/4/6/8Small: 2/5/4/6/9X-Small:3/6/5/7/9