This set of precise measuring tools for determining the pupillary distance of glasses. Whether you're shopping for new glasses or fitting a customer, these tools will help ensure fit. The compact design makes them easy to carry with you wherever . Features -Color:Multi -Material: -Size:8.30X4.00X0.10cm/3.26X1.57X0.04in -Precision Measurement: Easy to operate and quick to use, ensuring precision measurement results. No extra hassle for you -Wide Application: Use for a wide range of applications, including dispensing stores, opticians and institutions -Simple Operation: Easy to use, even without professional knowledge can easily measure pupil distance -Portable: Small and convenient, portability, can be used in different occasions, such as outdoor, travel, etc -Practical Ruler: Not only suitable for the measurement of glasses accessories, but also can be used for the measurement of pupil position or other measurements need to use a soft ruler Package list: 2 x Pupillary Rulers