Large Fit Over Sunglasses
Small   Medium   Large   Extra Large

Step 1.  Measure the widest part of your prescription glasses from the outside left temple to the outside right temple.
Step 2.  Measure the height from the top of your frame to the bottom of your frame.
Step 3.  Your prescription glasses must be smaller than the measurement for the styles listed below.

Style F15: 5 5/8" Wide x 2" Height
Style F18: 5 7/8" Wide x 2" Height
Style F40: 6" Wide x 1 1/2" Height
Style F22: 5 7/8" Wide x 2" Height
Style F29: 5 7/8" Wide x 2" Height

For international customers these are available on our ebay store Sunglass Rage Large.