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.

Not available Online
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 seasonal earthy brown hue
Grid' texture on the outside of the temples
Rx-able blue polycarbonate lenses
Logo lettering along both temples and on the left lens
Flexible hinges and molded nose pads ensure all-day comfort