Aviator (XL) Fits over prescription frames measuring less than 140 mm in width by 51 mm in height (5 1/2 inches in width by 2 inches in height)
Mini Slim (MS) Fits over prescription frames measuring less than 125 mm in width by 35 mm in height (4 15/16 inches in width by 1 3/8 inches in height)
Pilot (L) Fits over prescription frames measuring less than 138 mm in width by 48 mm in height (5 7/16 inches in width by 1 7/8 inches in height)
Slime Line (M) Fits over prescription frames measuring less than 133 mm in width by 39 mm in height (5 1/4 inches in width by 1 1/2 inches in height)
Stream Line (S) Fits over prescription frames measuring less than 128 mm in width by 38 mm in height (5 inches in width x 1 1/2 inches height)
Wide Line (ML) Fits over prescription frames measuring less than 138 mm in width by 36 mm in height (5 7/16 inches in width by 1 3/8 inches in height)
Style Line (MX) Fits over prescription frames measuring less than 142 mm in width by 39 mm in height (5 1/2 inches in width by 1 1/2 inches in height)