There are a few different versions of the Classics style (Madrona/Headland/Original) lens's a long story.   You need to check the "Lot Code" on your shades to determine which size fits your frame.

Take a look here, what does it say?

lot code diagram - lot code is 4 digits on the right arm

Is the number 1906? 

Click here - (Classic Kit III)



Is the number between 1709 and 2106+ (or higher than 2106)
(*except* for 1906, in which case click above!)

Click here - (Classic Kit II)


Is the number 1705, lower than 1705 or missing?
(1602, 1604, 1705, rubbed away or doesn't exist)

Click here - (Classic Kit I)