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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Carrera sunglasses gained an iconic status thanks to their timeless design, meticulous Italian craftsmanship and unsurpassed comfort. That is nowhere more evident than in the label's latest collection — particularly these famous pilot sunglasses that keep selling out, season after season. Rendered here from gold-tone metal complemented by white acetate tips, the distinctive design is made even more charismatic with the finely crafted 'C' monogram — an archive-inspired motif and the recurring theme this season — and the discreet 'C' logo inside the left end tip. Enhanced with complete protection against harmful UV rays, the mirrored lenses glint with a light-green sheen. The result? One of the label's most iconic sun styles made even more desirable.
Oversized classic pilot sunglasses
Gold-tone metal with white acetate arm tips
Double bridge adorned with a front center 'C' monogram
Logo lettering on the temples and the left lens
A subtle ‘C’ inside left end tip
Polycarbonate lenses with a mirrored light-green finish
Silicone nose pads can be adjusted to fit comfortably