If you want to make sure your press on nails fit perfectly, order this sizing kit. One nail in each size is included and you can skip the hassle of measuring with tape and just see which nails fit the best. Details and Tips for sizing 🌶 When choosing a nail size, if you are between two sizes, choose the larger size. When polish is applied to the artificial nail, they lose a bit of flexibility and if the nail is too small, it will pop off much faster. 🌶 For most accurate fit, measure your BARE nails, no polish at all 🌶 Make sure you measure all 10 fingers as finger size may differ on each hand.