This kit allows us to be able to provide you w/ nails that'll fit specifically your nails. This kit Must be purchased w/ your 1st purchase of press ons. When purchasing the 2 you will receive 25% off. After you receive your measurement kit please size your fingers & fill out your press on form & email it to Recoveryroomnailsbeauty@gmail.com w/ your order # . After measurements are sent. We will have your measurements indefinitely, for future purposes.