The nail tips featured on Bling Up are all made to order to fit your hand. If you have a soft ruler, you can use the following method.
You may use soft flexible ruler like the one shown above.
If you have a soft ruler, you can hold one end of the ruler at one side of the nail. measure across your fingernails and read off the measurements.
Begin measuring from one end the nail...
To the other side of the nail. In this instance, the measurement is 15 MM.
Please be sure to lay the ruler flat against the nail for an accurate measurement.