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This is the most common location of your frame size.
You may also check along the bridge or on the earpiece.
|Size||Frame Width||Arm Length|
|Extra Small||108-127 mm||100-129 mm|
|Small||128-144 mm||130-135 mm|
|Medium||130-152 mm||136-140 mm|
|Large||145-160 mm||141-150 mm|
There are normally just 3 measurements, but up to 5 can be used for frames.
|Pro Tip||Try on a pair you like and look at the size for reference, then stay close to those measurements.|
Fold the PD ruler in half along the indicated line.
Measure yourself in front of the mirror or have a friend help you.
Place the PD ruler over the bridge of your nose with the 0 above the center of your left pupil.
Look straight ahead and mark the stop on the PD ruler that lines up with the center of your right pupil.
Enter your PD measurement into your prescription
when you select your glasses.