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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These unisex sunglasses play with retro references and refined modern touches. The elegant pantos shape, also known as ‘teacup’, is traced along the edges with Carrera’s new ‘grid’ texture – the season’s unique signature. The full-rim frames are accented with a keyhole bridge for a classic, comfortable look and fitted with polycarbonate lenses that provide total UV protection.
Unisex sunglasses with a full-rim pantos profile
Polyamide-injected frames in a dark Havana finish
Carrera’s signature along both arms and on the left lens
Green polycarbonate lenses
Can be fitted with prescription lenses
Molded nose pads and flex hinges for a secure and comfortable fit
Come in a complimentary storage case