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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Classic, but never boring – these acetate eyeglasses add a touch of modern character to the full-rim pantos frames, courtesy of the newly introduced ‘grid’ texture that brings depth and definition to the slender arms. Supported by molded nose pads for a non-slip fit, they’re equal parts sophisticated, cool, and comfortable – an unmistakable Carrera look.
Full-rim pantos eyeglasses
Acetate front and polyamide-injected temples in a striped gray finish
Logo lettering along both arms
Flex hinges amp up the comfort factor
Molded nose pads
Come in a complimentary storage case