How do I know if the nails will fit my hand? Ordering a sizing kit is the best way to get the perfect fit for your hands. But if you're already a press on girl and know your size already you may order the standard size that best fit you. Small-2,5,3,4,9 Medium-1,4,3,4,8 Large-0,3,2,3,7. You also have the choice of sending your custom sizes to me along with your order number by emailing neeshieluxnails25@gmail.com or Instagram DM.