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 combine classic Carrera style with modern appeal. The injection-molded polyamide design boasts a full-rim pantos silhouette, also known as ‘teacup,’ traced along the edges with a touch of the brand’s signature ‘grid’ texture. The flexible hinges grant comfort and a perfet fit.
Modern sunglasses with a subtly rounded pantos silhouette
Injection-molded polyamide frames in a black and green colorway
Grid' texture on the outside of the temples
Green photochromic PHOTO-C lenses adapt their level of tint as the sunlight changes throughout the day
Logo lettering along both temples and on the left lens
Flexible hinges and molded nose pads ensure all-day comfort