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.|