Our Nail Sizing Kit is the most accurate way to determine your custom sizes.Each kit includes one nail in every available size for your chosen nail shape. Please purchase this kit before ordering your nail set. How It Works:1. You order the kit and choose your desired nail shape and length.2. When you receive the kit, try on each size to determine the best fit for every finger.3. Write your sizes on the card.4. Return the completed sizing kit to use using the provided return shipping label.5. Once we receive the kit, you will be provided a $10 discount on your next order. 6. We'll keep your sizes on file for future orders, making reordering quick & easy. Please Note- Sizing kits are specific to nail shape selected. If you order a different shape in the future, a new sizing kit may be recommended.