You can find measurement A/B/C printed on the inside of the temple arm or on the nose pads.
If you already have a pair of glasses that you like, you can compare measurements to see how a certain style of ours will fit you.

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A sleek and contemporary look perfect for the modern consumers – these square-frame eyeglasses elevate the classic optical frames with a unique interplay of materials. The full-rim acetate front is paired with slender injection-molded polyamide arms accented with Carrera’s signature ‘grid’ texture sophisticated three-dimensional treatment . Thoughtfully equipped with flexible hinges that ensure a personalized fit. A perfect match of comfort and coolness, for sophisticated tastes.
Unisex eyeglasses with full-rim rectangular frames
Black acetate front, injection-molded polyamide black arms
Flexible hinges and molded nose pads for all-day comfort
‘Grid’ texture on the temples
Logo lettering along both temples
Come in a complimentary storage case