Largest Size Sunglasses That Fit Over Your Glasses
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 Fitting Chart For Sunglasses Over Glasses 

Step 1.  Measure your prescription glasses from the outside left to the outside right temple. 
Step 2.  
Measure the highest point of your glass lenses, it usually the middle of your lenses.
Step 3.  Use your measurement results to determine which style below will fit over your glasses. Your glasses must measure smaller than the measurements for each style below.

 Style F19: 6" Wide x 2 1/16" Height
     Style F30: 6 1/8" Wide x 2 1/8" Height

The above mentioned styles are pictures below.